For the 3 first instances, this is due to lag and centralization of communities on LW. Moving communities away from LW would actually help solving that issue (in parallel, Reddthat is planning to open an EU server to reduce the lag)
That's an important one, especially with how long it took LW to upgrade. I completely get why it's more challenging for them due to their number of users, but that could be an argument for enthusiastic users to move elsewhere.
Be aware that your content may be downvoted as not completely related to the topic of the community. There is !taylorswift@poptalk.scrubbles.tech which will definitely welcome this kind of content.
Your instance looks very interesting, I'll have a look and wish you good luck here on Lemmy!
And jlai.lu for the French speakers!