Desired Specification for a new Driver?

Hi all - I started drafting a specification for a new driver last night but I came to the realisation that since I'm extremely new to Lasers and the LPF - I have absolutely no idea what people would actually want :)

So this is a "feature request" thread. What things from existing drivers are essential features, what other features would people like. I want to design something that's actually useful. Even if it's a redesign of something that's out there but generally unavailable, or something that's using obsolete components I'd happily dip my toes in.

If I end up designing something that people actually want to use I'll make up some panels of them and see if I can get a good price for PCBs and assembly of a small batch to send round to people for evaluation.

Things I'm specifically looking for guidance on:

• Dimensions & mounting holes etc. (Circular/rectangular?)
• Input & Output voltage range (Buck or Boost? Buck-boost?)
• Protection (reverse polarity, undervoltage, thermal, any others?)
• Kit form or assembled & tested?