Agreed. The other nice thing is that each year you get a new band, but the old one still works. So if you lose a band it isn't the end of the world either. You can even just purchase a new one at the millions of locations that sell bands and not have to wait in long ticket lines.
I just don't understand why anyone would be against Universal doing a band system of some kind. I am not saying go as far as Disney did with all the ride interactions or FP, but I would think room entry, park entry, and express pass entry would be a pretty good start. If you want to tie room charges there is another thing. Make it optional (which WDW is optional too, just very few people opt out) and so for people who want it they can have it, for those that don't, they can keep their old pass. It won't cost Universal 2B, they don't waste money like Disney does.
I think this would be a good option, but shouldn't be the end all be all. If you have ever used a coupon on your phone you know how much this can slow things down with each phone being different. Also, some people STILL do not have smart phones and I think there should be an easy option for everyone. Also, this doesn't help with room entry.