This is going to sound big headed but I'm going to say it anyways!
I would class myself as seasoned gamer, in terms of the old school understanding. IE I do not play/understand a small small section of games(or even game). Instead I feel I understand games as a whole with some special areas of expertise (shmups and racing games). I also enjoy board games, role playing (dont get that much of an opportunity these days) and even card trading games. Because of this, I view games as the enjoyment contained within it rather than it's packaging. A great game can look crap, sound like a spectrum loading, be bug ridden and I dont care providing the core mechanics are good.
This core mechanic, however, can be embellished with bling. Better graphics, amazing sound, deeper rules, etc. But for me, this is irrelevant, as I can fantasize in these things. To my mind Gran Turismo 1 is just as amazing as 5, GTA 1 is as great as GTA V, just as Doom is to Call of Duty (whatever number they are currently on). The one disadvantage of this 'bling' is that it can get in the way of fantasy and hinder suspension of belief but equally it can be 'cool'.
This may sound like I'm arguing outside the topic. It's relevance is that adding something is NOT the same as improvement unless the core game is unchanged and ,by definition, if the core game is the same the addition is not needed and only brings the 'bling'. If however, the core game is changed, it needs to be viewed as a separate entity and reviewed as such.
I do, however, think that writing new games using old play fields is a great idea. Like any mod, as long as it's reversible, there is no risk.