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I personally don't really care for this change, but it would have been nice - although I understand it would have taken significant time/effort to develop that could be used in other areas with the limited resources - if there was some criteria to create a selection of instances that would be randomly selected based on something like:

1. instance age - Your instance must be active for N months/(years?) to qualify to ensure rando spawns that may die a week later don't impact users, as well as being able to track the next rule:
2. instance reliability - If there is a way to track this, only include instances that meet a specific number and maintained it for the last N months. It would suck to throw users into an unreliable instance, or one that started off great but started going south in the last 3 months.
3. same server rules and privacy policy - To ensure a "family friendly" set of default instances that people could easily join without having to overthink it.

Not sure what else they could track, but those three would be a good start, though admittedly a lot of additional work.