I think the only way the banner could get any better is if Team 7 were adults, as shown in the last chapter. I think it'd perfectly capure that nolstagic feeling the designer seems to be conveying. You'd have team 7 all grown up, and that collage in the background, depicting their experiences and time together up til that point. Indeed, it's been a long ride.
Though the designer probably started this before the chapter was revealed. And still, it's amazing.
As for the other stuff, I don't mind it. The new dislike/like isn't totally unlike the rep system, and I like the rep system so of course I don't dislike this new system. I can understand why people would feel having two similar systems in place is clutter though.
I wouldn't be surprised if they plan on using this system to solve "rep whoring" issues in certain sections, since the rep system is capable of being removed from certain sections. I suppose it does open up some options.