These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Game Breaker: If you pick up Line Bomb combined with Infinite Bomb, you're in for a treat. If you're on the receiving end of it... not so much.
Hype Backlash: Yes, actually! This was promoted as possibly being a new birth of the series. To say that didn't pan out would be an understatement.
Older Than They Think: The First-Person Bomber mode might have been inspired by the gameplay of the Japan-only title 3-D Bomberman, which was actually played in first-person view, unlike Act Zero's behind-the-player perspective.