I wouldn't mind it, but if I had ever played it I wouldn't read the review, ofc. Probably I'd just find a gameplay video on Youtube and not read reviews. There's just a big gap between a description (let alone trailers which are absolutely devoid of gameplay footage), and what the game is like to play. That's what I do now before I buy a game.
But: I think if you have (non-obvious) playing tips or strategies, or a story behind or around a game, then that would be worth following. There's also something to be said for reviewing underdogs: games that you think are good but wasn't a big success, or was overlooked, or where the reviewers "didn't get it".
