You'd have to contact the ppa maintainer (ricotz) and ask him to do for you. I don't know how much better the performance will be with D14
You can also ask the snap maintainer @oSoMoN to compile the dev version with that patch applied.
Can you attach the log files ? crashlog.dmp especially see https://trac.wildfiregames.com/wiki/ReportingErrors
and https://trac.wildfiregames.com/wiki/GameDataPaths
Alternatively you can try to run the game with --writableRoot