The abilities are good... to me, thats just it... I have some criticism I want to give you that you could fix maybe. I'm not good at putting things to words without hurting peoples feelings so I'm sorry if I offend you.
Tails:
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Tails was very fun, better than sonic (You'll find out why). The Custom 2 button made no sense... it didn't really feel over powering. While the jump thok is good to have around, you should have gave tails the ability to fly after using it. Because what makes people over powering isn't their abilities, but how they can use it all to go very fast and beating levels with ease. Like with Sonic. He can Hi-thok and quickly stomp down with one jump, thats what I mean. The turbo boost is very good also, it helps him go faster while flying and can take sharp turns with while keeping speed!
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Sonic:
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No offence, but I feel like Sonic is getting worse. This may just be a lua error, but if it is you should test before updating. When sonic stomps now, explosions don't spawn, homing thok still somehow feels useless to me, and when you do your Hi-thok and attempt to do a homing attack, most of the time you don't even hit the enemies. It's almost like you're not checking on him.
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Honestly... I will admit I went too far, the mod is great. But still lacks from the title "Better". For a beginner though this is good, I can't wait for you're future addons (that is if you plan on doing more).
1.4 Update rating
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While 2.2 plays the same... did you even port it? The only thing that works is Sonic's double jump. Nothing else.