1) Don't spend too much time on development.
I'll agree AND disagree. Mostly because I'd like to not have to play some recycled piece of shit every 2 years. If there's enough re-playability in the game, then yeah, shoot for 5+ years, nothing wrong with that. BUT, because this is business we're talking about, we all know that shit ain't gonna happen...for the most part.
2) Change your engine every so often, and if you can, use one that you've developed yourself.
Agreed.
3) Try to keep the [dev] team the same, especially if the original was good.
Also agreed.
4) Don't get rid of the parts of the original that people loved.
This should go without saying, but it needs to be said, sadly.
5) Don't try to evolve too much and forget what made the original great.
Addendum to #4
6) Improve everything, because one bad aspect can bring the whole game crashing down.
I can only conclude that "improve" means "don't change it, only make it better." Unfortunately, this gets lost in translation at times.
