The AI in Double Dash is a complete dumbass. You should frankly not need very much item help to get from 2nd to 1st at all, though I will admit the frequent Blue Shell does help if you got screwed over earlier. Nevertheless, I really do feel that such complaints are better directed at DS and Wii, which attempted to fix AI while still holding to the same broken item system.
If only I had my PB Objection thing. Either way...
Perhaps I should make myself clear here. What I'm talking about refers more towards the TRUE fun of Mario Kart, the great joy of racing with friends. I'm not talking about the single player mode, because like you said, the AI is moronic. Hell, you can see it in Mario Kart Wii with the Blooper, since it 99% of the time NEVER screws over real people racing. However, even the single player mode benefits more from 5th-8th place racers screwing over 1st place. The problem is, usually YOU are in first place, but it's still 5th-8th place screwing you over, not 2nd-4th. Also, trust me, my complaints about items & unbalance issues are directed at EVERY MK game post MK64.
Double Dash's item setup is, IMHO, the testament of gamers needing to be careful what they wish for in regards to rubber-band AI bitching. Because there are only so many ways you can go with racing AI. You can make it adapt to the player (MK64), you can make it really freaking hard regardless (F-Zero GX), or you can constantly nuke the leader (Double Dash). People bitched about 64's AI, and frankly, they shouldn't have.
Oh, I agree. I'm sorry, but whoever complained about Rubber Banding in MK64 sucked. Even with rubber banding, the game was not hard and the AI did not go completely out of it's way to screw you. Hell, there was more of that in SNES MK, with "character rivals." God forbid you were Toad, cause Luigi gunned for your ass with Invincible Eyes.
What you're describing is inevitable with any degree of customization, though. And with kart stats having been established for the last three games, I don't think that's going anywhere. I'd rather see signature items with only minor kart stats as in DD than kart stats that turn the whole game upside-down as in DS and Wii.
What you're describing is not customization. And you're right, they're not changing kart stats back to pre MK64, and I think the game suffers because of it. It makes it unbalanced. Signature moves are also not customization, as they are directly tied in to what character you choose, again adding in an unbalancing effect, no matter how minor. Customization is what ModNation Racers is all about, and it's done perfectly. You can customize the look of your racers, your tracks, and the design of your kart, but in NO way does it change the game. It's balanced and after playing it, it even further makes me realize what Mario Kart has lost, and it's sad.
I just want to say, we need this. I missed the classic mechanics while playing DD, I admit, but there is something to be said for your own custom character pairings. I really feel that both modes have enough merit that they should be able to co-exist.
Again, the only way I would accept this is if both the items and the karts themselves were balanced, with no signature moves. However, since we both know that's not going to happen, I don't want it.