It's probably putting down a marker for UEFA, hoping to put pressure on them to apply their rules but raising the prospect of legal action if they don't. FSG invested £300m in LFC based on the rules published by UEFA, that LFC and every other club would be required to comply with. Reiterating that this was a significant factor in their investment decision, and if UEFA fail to enforce their rules and it disadvantages FSG's investment they may seek compensation - which could be very damaging for UEFA.