All great, except this:
Note that unverified Flatpaks also do not feature any reviews and do not have a score.
Taken from their New Features page: www.linuxmint.com/rel_wilma_whatsnew.php
I genuinely think this is stupid. If you're worried about unverified flatpaks being a security risk so much so that you disable them from your software center, at least you could keep their reviews so users could at least know if the app can be trusted.
I love Linux Mint. What Clem and team have been able to do and keep on doing is simply amazing, but in this case, for that specific part of this new choice, I'll have to disagree.