People who loathe the idea of paying a sub to play a solo game aren't going to change their minds anyway.
Trusts will be useful yes, but not in the way they think... It will help new players who want a MMORPG but want to catch up at their own pace.
The DQ team had the correct idea with using DQX Offline for people who just wanted a single player experience. What they do with XI and XIV isn't it... Moreover even when content is solo'able in XIV, the experience is nowhere near the same as a single player jRPG due all the design decisions applied because it's a MMORPG that wants to keep players subbed and still "respect your time".

Also the acronym "SRPG" doesn't mean what you think it does. SRPG is a sub-genre of RPGs called "Strategy RPG".