Battery drain issue

Alt is replaced and the battery drain issue is much better, but hasn’t disappeared completely.

Wondering if it could be related to this new problem I’ve noticed. Since the changes, all my lights (headlights, park, tail, even dome and dash) flicker BAD at idle. They get steady when engine rpm comes up but not necessarily brighter.

This wasn’t a problem before. I have installed (and loved) Crackedbacks headlight relay kit as well as his wire around. I don’t think that they are the issue as the flickering lights are a new issue.

Could the new alt output be too high? Sometimes it reads high 14 volts and even 15 at idle. Any thoughts on this new issue?

Thanks again.