The issue about low save space has been resolved in the recent polishing update afaik.
I see it has been rolled back to 4.35 and i had no problems so far with that version.
I also like how the system works: you get one save per freshly started game in which all the towns you "have" are saved. The recent update tried to sort the towns differntly as i understood it - and that didn't go so well obv.
I do not get what benefit multiple save slots per character would bring to the table(?) when you get multiple save slots by starting a new game already.
I f you have many saves they will pile up even more if you have multiple per character.
Yes i am quilty of generally making too many saves i never load. Not beeing able to have multiple saves per character keeps you from doing that and thus makes it more tidy without saves piling up endlessly.
The indexedDB saving system introduced in the polishing update gives most players unlimited saves, but it's not fully supported across all browsers & devices. The old saving method (with a 5 MB limit) is still available in the game as a backup. I think if I give players more control over their manual saves, that'll help players who are dependent on the old system.