The only thing I will say (From playing with MultiMC Today) that the native launcher does better, is handling multiple version instances within the same actual "Instance". I quite like being able to hop between 1.16.5 and 1.17.1 with the same settings and options, but MultiMC I have to have two profiles which aren't then in sync which annoys me. The answer seems to be to make a template, but I also don't really like that as it breaks other good native functionality of MultiMC like launching FTB / Tekkit / Other non-vanilla versions / variants of the game.
Please Note: The TotalFreedom Forum has now been put into a read-only mode. Total Freedom has now closed down and will not be returning in any way, shape or form. It has been a pleasure to lead this community and I wish you all the best for your futures.