I completely understand all of your points and a part of me would agree 100% if it wasn't for the fact that I do enjoy the sequels a lot >_>... that's my guilty pleasure, i love sequels and with nintendo this generation every single one of those games you mentioned (except skyward sword because i have yet to play it) gave me that sense of joy, which is why no matter how much I get bashed, get called a fanboy and be looked down upon for liking my wii I will still defend my taste because I enjoy revisiting franchises, like fire emblem, dawn of the new world, silent hill. Heck I even got try new games like no more heroes, tasunoko vs capcom and muramasa.
to be honest I gotta be honest with myself and say that it has been a while since i touched my Wii (my 3DS/DS is another story)... but you see it is probably because of the reason you explained which is nintendo no longer supporting the wii anymore. Usually when I get a new wii game it gets my undivided attention until I 100% it and since there have yet to be new games out there I just have not played my wii as much and does really bug me.
But I do see a change with the Wii U and that is at the very least more 3rd party support, if anything i'll be ok with nintendo rehashing franchises as long as the Wii U receives that 3rd party support...
I do admit sometimes I wished I did not like the wii since it just brings me more trouble than it is worth...and even if I try to explain why I like it... It just never seems to come across well enough...