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So, at first, level 10 max is not all that bad. I'd also prefer Solasta characters to reach 20th level, of course, but this "wet dream" can be frustrated due to budget issues and time constraining, since devs should make quests/challenges/locations more appropriate for higher level characters.
It's a matter of personal preference.
I have never liked the level caps in EVERY CRPG i played with one, and were probably a hundred. I also never liked the lv20 cap in D&D various versions and used specific optional rulesets to extend it at least to 30, demigodom etc.
In a computer transposition this is even more felt because the level-up is one of the few gratification that a computer DM will give you.