Um, no. Those are good workarounds, which are fine as temporary fixes while waiting for an actual patch.
They don't fix the underlying problem that the number of savegames noticeably affects gameplay that doesn't interact with savegames - that shouldn't happen. Figure out why, then figure out a way so that it doesn't happen (easier said then done, but that's what one has engineers for

. Or mechtechs)
(For that matter, what happened with Pillars of Eternity shouldn't happen either - the time it took to save/load a game increased rather dramatically as the number of existing savegames rose. I hope they fixed that for Deadfire...)