Honestly, these are good ideas.
I'd also appreciate the ability to have alternate-fire swap modes or instantly fire the alt-fire based on user-choice on a per-weapon basis. It's a bit cumbersome to use Euphona Prime's buckshot because, even on a thumb mouse button, it's awkward to have it instantly fire on alt-fire when so many other weapons' alt-fire button swaps modes.
So, options to convert semi and burst weapons into auto and auto-burst for player comfort would be ideal. In fact, I'd support them being exilus mods that cost zero capacity specifically at base rank, but can reduce the downsides if their rank is increased (In the end, making them cost 5 capacity at max rank of 5 for minimal downsides).
Considering how many exilus mods are just wasted space, and how auto weapons are in such an impressively more comfortable spot than semi trigger weapons, these new exilus mods could allow for semi and burst weapons to reenter the fray in a big way for people who don't want to get/exacerbate carpal tunnel/tendonitis/arthritis with click spam.