Liverpool supporters' union Spirit of Shankly are part of a number of fan-groups who have labelled the Champions League's reform as "a back door attempt" to revive the Super League.
And the proposals have been slammed as "irresponsible and out of touch" by the Football Supporters' Association in a statement on Tuesday as people across the country prepare to become gripped by a cost of living crisis.
From the 2024/25 campaign, the European Cup will follow a new format that sees the total number of participants increased from 32 to 36, with the group stages set to be replaced by a single league table that includes all clubs.
Each team will play at least 10 league games with the top eight qualifying for the knockout stages, while two places will be given to the clubs with the highest UEFA coefficient over the previous five years who have not qualified for the competition through domestic league performance the previous season.
The plans have been viewed as an attempt to preserve the status quo at the elite end of the game and ensure historically big clubs do not miss out on the lucrative earnings of Europe's premier tournament, even if their results on the pitch are not good enough to see them qualify on merit.
SOS are just one of several groups to have combined as part of the Football Supporters' Association to brand the Champions League restructure as an attempt to force through the highly controversial Super League that was widely and aggressively opposed 12 months ago.
A statement from FSA on Tuesday said: "Premier League Supporters’ group oppose Champions League changes that will entrench the richest clubs; damage the English football pyramid; and rip off fans.
"Our Network represents fans that support teams across the English Premier League. We are united in opposition to proposals to reform the Champions League that are a back door attempt at a return to the discredited idea of a European Super League.
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"Last year, it was our supporter groups that united to force the collapse of the European Super League. At the time, UEFA told us that fans were the heart of the game and promised fans’ views would be centre stage in deciding what came next.
"So it is with great dismay that we now face the prospect of changes to the Champions League that will mean many more group games being played and entry for some clubs being based on a historical five-year ‘UEFA Club Co-efficient’.
"These proposals will only widen the gap between rich clubs and the rest, at the same time wrecking domestic league calendars, with the expectation that fans sacrifice yet more time and money attending meaningless group games.
"Fans do not want even more European games, especially drawn out group stages of ten games and an extra knockout round. It is irresponsible and out of touch to even be considering imposing yet more games on loyal fans who face a doubling in the number of home games they will have to attend before the last 16 knock out round even begins.
"This will be compounded even more by the cost of living crisis that is hitting Europe. We do not see how increasing the requirement for teams and fans to fly around Europe is compatible with UEFA’s environmental commitments."
Last year, a plot to begin a 12-team Super League that ring-fenced participation regardless of their domestic performance was quickly brought to its knees as football fans across the continent rallied against the idea. Within 48 hours of its existence being made public, six Premier League clubs, including Liverpool, had backed out following vociferous and widespread condemnation.
Liverpool's principal owner John W Henry was forced into a public apology on video as Fenway Sports Group came under heavy fire for their part in attempting to get the breakaway Super League up and running.
The FSA statement added: "We also fear for the future of the FA and League Cups that are vital financial redistributive mechanisms in our football pyramid.
"We are calling on UEFA, and the members of its executive committee (EXCO) to specifically reject any plans that: Base qualification to the Champions League (or any other UEFA Club Competition) on anything but sporting merit performance in a relevant domestic league.
"Increase overall the number of games in the competition. To do so, will further increase financial pressure fans and also damage the welfare of players who are being asked to play too much football.
"Premier League fans do not want ten group games involving a small cartel of rich clubs further distorting competitive balance. We want strong, competitive domestic leagues, an equal opportunity for all to qualify for UEFA competitions based on sporting merit, along with a fairer distribution of the game’s wealth from the revenues those competitions earn.
"Last year we engaged in constructive discussions with UEFA president Aleksander Ceferin who made a commitment that fans would be listened to in this process. Our collective voice is unified and our position clear.
"We call on UEFA to demonstrate that it acts in the interests of the wider football community and its supporters, not just the interests of the few rich investors and state-owned clubs that, less than a year ago, tried to destroy the European football family."
