How exciting! The changes you mentioned sound great. I am looking forward to everything you are planning. I don't have any specific ideas but there are a couple things I just want to say about changes and this game that are important to me.
1. I like that I have stuff other people don't. It makes me feel special. Please don't bring back retired things. Having retired stuff is the reward for sticking to a game for a long period of time.
2. Please make a nice mix of short term homes and long term homes. I would pay more for homes that pay better over a longer period of time (less clicking). Same with businesses, industries, etc. The mix is not so great right now.
3. The Gem making building for new players is awesome, but how about something even better for your loyal fans who keep playing even through this transition. We deserve something nice that new players can't get because they are new. I'm actually a little jealous of the idea that they can get something I can't and I think you'll have people restarting accounts under new names just for the new reward. Make it worthwhile for us "Oldies" so we feel special too.
Thanks again for the major revamp. I'm loving the changes so far, even those I know are probably temporary.