@EUCommission
Good and frankly long overdue step.

Furthermore, as others have already mentioned, withdrawing from that platform would also be a correct step. Yes, it's a bit different from the position of institution since you need to reach people somehow (kind of like journalists need to stick to even some nasty spaces) however:

A) That corner of space should be under YOUR control. Basically what you're doing with Mastodon presence is the way to go. Your instance, your infrastructure, without reliance on external actors, especially now

B) It must COMPLEMENT the official channels, not replace them. Your social outreach must not become what the US institutions (and I use the term loosely) are doing.

So yes, you're walking in the right direction and there's still room for growth.
Also, probably the most important thing: Social media must be "people first" not "engagement first".