Gollum was a big misstep, agreed; playing from Gollum's perspective for a few levels within a game could be fun, but not for an entire game.

There's also a Return to Moria game coming out later this year that looks fairly promising: https://www.returntomoria.com/

His disappointed sigh when he realized he couldn't break the shower door glass to get the shotgun, haha. Fun video.