Sonic Lost World is a fantastic game and the series true return to form since it literally is in level design and gameplay that of a 3D Genesis Sonic. Anyone who didn't get that does not get Sonic period.
Generations and Colors were good but they still relied way too much on something SOnic has NEVER EEEEEEEEVER really been about but the misconception is what Sonic is about. Speed. People just don't get it. Gens and Colors used boost mechanic and about going as fast as possible. See that's the issue. Play a Genesis game and then play Lost Worlds and see how similar they are. Levels are branching paths with lots of platforming and obstacles. Now the goal of each level is to avoid obstacles and get a momentum going and keep that momentum and the REWARD was speed.Lost Worlds did this just like the Genesis games.
Sonic Boom has a few sins already. First after so many years since the Sonic CD US Soundtrack with the Song Sonic Boom we have need a game named that. We finally get it and it's messed up.
Sonic Booms other problem granted it's a spinoff and direct tie in to a TV show. The speed parts people like are everything wrong with Sonic games up to LW. Speed and likely all downhill with a couple loops like Sonic Advance 2 level design. At best maybe Sonic Rush. Still not much. The beat em up sections remind me much of Unleashed. Not a good thing.

Lost World used the top example of Level Design and that is why it's a proper Sonic game.
Boom even as a spinoff seems more like a Mcguffin child of Heroes and Unleashed. Two horrible games in one.