Well, hot is a bit of a loaded term, I live in the UK, my opinion of what hot is might differ from somewhere else . Most of our gigs are in pubs and clubs it has to be said, so we have done about 12 outdoor gigs a year, in the last year several of those have been hot, 3 of them have been burning hot (ie, I ended up with the parts of my legs in the sun burned). All of the hot gigs have been full sets (ie, 3 hours), rather than as part of multiple bands, and all of those the 12 step has been in the sun. One of them my voicelive (on the same pedalboard) died because of the heat. To be honest, the most danger it gets is people spilling beer on it in a crowded pub. I just looked at the reciept, I got it in feb 15.
I don't really have photos of it in use since about 3 years ago, all the pictures I have of live are of my bandmembers, or the crowd. But this was when I rewired the board for the helix about 4 months ago:
There is a lead that has a right angle USB (type A) that goes from the USB of the 12 step under the helix and round to an iPad (and soon an axoloti), and another lead goes to the TC footswitch. So that 12 step has done over 200 gigs, most of them over 2 hours and its doing well, it looks a bit tatty at the edges but nothing like yours.
I use it for chords on many songs (I play the bass and sing as well), and it is good for that, haven't had issues, I will be using it for switches to replace the jam man next to it, which just plays sequences and samples. I use it with USB rather than the little midi connector (I do have the KMI midi box, although the screws have fallen out of it). Can't say about the company as I have never had an issue to contact them, although obviously that is how you can judge a company.
I dont' think it is possible to change the LEDs manually on the 12 step, they light when key is held (you can set them to latch which is most of the songs I do)
If I was in your position, I would definitely hack that board to get it to do what you want. Unfortunately there isn't much else like it, although maybe the behringer footpedal would do what you wanted, or any old footpedal with the electronics taken out and an axoloti put in would be good. They are all a lot bigger though