With how frequent these merges are coming, and with the vastly different settings on the 4 servers (UK), I think it would be nice to be able to switch our booster buildings (stonemason, glassblower etc) from boosting marble to crystal, or whatever, instead of having to tear them down and rebuild them if we want to move to different islands. My stonemasons are lvl 40 so that's just crazy.
With the last merge we chose server #2 with the 35% marble boost, but it was crazy overcrowded (7200 players) and it was almost impossible to find empty marble spots, and get your alliance mates in the same area or close by. Server #3 with the crystal bonus was less crowded with half the population of #2. Something we couldn't foresee or plan for at the time.
Now having a better idea, it would be nice if we could switch to the less crowded #3 server for this merge, where it'll be easier to find useful islands, expand, and get the alliance closer together.
Nobody knew another merge was coming so soon, so we set ourselves up to take full advantage of the marble bonus on #2, so now we feel like we're handcuffed to #2 for the rest of our lives, because it would be so impractical and painful to have to rebuild booster buildings if we wanted to move to a different server configuration. Because ofc we'd want to move some of our marble towns to crystal islands to maintain a competitive level of production.
#2 is still crowded with 6200 players, with 2 other communities about to merge with ours, so it's only going to get more difficult to stretch out. And we could potentially lose our current location if someone moves in before we do, making it more painful trying to find a new area and coordinate that with 20 other people.
It would also be nice just to be able to see what the other servers are like every couple of years, if the merges continue to be frequent. Allowing us to convert booster buildings so we can move to different islands would make those decisions easier.
Or instead of having 4 different booster buildings for each of the resources, maybe just have 1 universal booster building for luxury resources?