I have 3 credit cards…

1. Oldest, good for groceries, but that’s it. It represents about 45% of my total credit card limit.
2. Crappy card, used to have good rewards but now sucks. This is about 40% of my total credit card limit. A few years old. I use it once every few months to keep it active.
3. My current “best” card that I use for most things. Only had it about a year. Represents around 15% of my total credit limit, but I’d like it to be more as it has the best rewards.

I pay off all my cards twice a month and have a great credit score.

I’m wondering if there’s any drawbacks to cancelling my crappy card and either applying for a limit increase on my good one or just applying for a new/better card.