what I mean is they put it in so devs don't have to support it, it's more expensive now but the effect is it supports more games, which is better to get out of the chicken/egg problem off "not enough players worth developing for/not worth buying since there are no games". with the touchpads you could probably take most games from the last 30 years and it will work easy enough without people having to fiddle with sticks or steam input profiles which would turn them off (especially for games which will never get updated to properly work with sticks). gaben himself said the first thing he did was play dota2 on it, imagine that with a stick.
if there's enough adoption to make it worth doing clones or a successor it's inevitable they make changes, like scrap features to be cheaper and sell via price etc., that's just the natural evolution. but you need to start somewhere, gotta give some to get some. if they only go with the bare minimum to save costs right from the start it would also affect the chances of possible success (highly doubt they make any money from it anyway, but it's not like valve uses their stacks of cash for anything else).
nah, in the end you gotta play it the way you like, nothing some dude on the internet says would change that and there's no point arguing about "better" or "worse" when it comes to personal preference (dualshock > xbox layout btw).
steam link is still exists, but like the controller is a software solution now, no point of selling dedicated hardware when people can just use their phone for it (or put it on a
raspberry pi if they still want sth like the link).