I think Aoe2 is to RTS, as tetris is to games with falling blocks.

Basically, the gameplay is perfect for the genre, and the long time players don't actually want any fancy changes.

You wouldn't try to change the gameplay of tetris to attract new users, because tetris is already the best falling-blocks game available. You'd be hesitant to add new blocks or funny colours, because the users like the currently available blocks and colours, and will continue to play with the available blocks and colours for another twenty years.

The tetris fanbase will always be loyal to regular old Tetris.

What you want when you play tetris is a regular, stable experience, where the buttons work as expected and application doesn't crash.

Maybe some QoL improvements. Some cool post game statistics. But the game itself, is basically perfect. Above all other things, just don't break it, and we'll be fine.