Sorry but i don't agree with this at all. Solo i was able to kill it on difficult in 15 mins with 5 random people it was dead on Very difficult in 2 minutes. Trusts are great if you can't get people but with everyone spamming this it isn't hard finding people to join. From all the conversation i have had about merging being an issue with the current game. The biggest issue really is trusts, I understand SE's logic behind trust because they were losing players and it was to help people who couldn't find parties.
They should of only made it possible to summon trust in the open world to level with. They should not have been allowed to be summoned in escha/reisinjima/HTBF/any relevant content so unless you were really good at actually soloing without the need of trust which only a small few actually areyou had to rely on finding people. With that THEN they should of merged servers together so we could have a bigger community and find people easier for stuff while still making it easy for people to level with trusts because that is probably something that would be most difficult to find people for unless you get power levelled by a friend which most don't have the luxury to do.