Count me in for the "not sick of vintage" club... other than my Sedin obsession, I'm really not that interested in current NHL players and have zero interest in breaking any wax that falls into the "McJesus or bust" category.
I'm really just a collector at heart, and I love building sets that meet two main criteria for me... they have to look nice and feature the history of the game.
Now there is a ton of stuff that gets pumped out that does not meet my criteria, but since I'm not into the hobby with the expectation that my stuff will be "worth" anything one day, it really doesn't bother me if certain players or eras are "overdone". And really, the manufacturers will never make a product that appeals to ever single collector, but I'm glad they do keep producing product because every now and then I find a gem.
I found ITG 1.0's approach really appeals to me - too bad I came to set collecting right as their last product was released, but looking back I just love the variety of niche products and interesting subsets - from team-specific stuff like Motown or Blue Blanc et Rouge, to era stuff like Decades 80's, to Stick Work, or my fav Lord Stanley's Mug, lots of stuff that I'd love to master set collect one day. Or even within a product, subsets that focused on brothers, 500 goal scorers, captains... love that so much had a theme to it.
Looking at the upcoming Leaf Ultimate, we've got single, dual, triple, quad, and sixes signatures... triple and quad memorabilia... equipment... signature memorabilia... signature relics ... and ultimate card - these are all basically one or more autograph and/or one or more swatch of a bunch of good players. Decades and Pioneers are yet more bunch of swatches grouped by era. Not that there's anything wrong with this stuff, but none of it is distinct enough from any other set with a bunch of auto and/or memorabilia featuring roughly the same players...
... That being said, Ultimate Journey is a neat idea, if it's not just 'whichever equipment we happen to have' but for each player featured there's a swatch from every team they played for, that's a neat little subset. Haven't seen a preview of the milestone goals subset, sounds like a cool idea if executed well. So there's a couple things that depending on the design and checklist I could be intrigued by.
To me, I don't really mind if vintage in general is "overdone", as long as every now and then we get a gem worth collecting. Here's a little sample of the sets I collect - I love how everything has a pretty distinct and different look from anything else I collect. If you pick and choose just the stuff that appeals to you, I think there are a number of worthwhile options out there to collect if you're a true collector at heart!
2008-09 Masterpieces, such a distinctive look, possibly my favourite autographed cards of all time.
2014-15 Masterpieces - I love hockey art, wish there were more all-art sets. Did I mention I'm a sucker for art?
While I disliked the majority of what Panini produced, what a nice clean design that really shows off the autographs and a great player selection in 2013-14 National Treasures.
I think Leaf hit a home run with their Vintage Memorabilia subset in 2015-16 ITGU. Perfect vintage photograph feel, nice touch with a flourish of foil but not too flashy.
And last but not least, Lord Stanley's Mug, I mean those Mega Patches, just the preview picture of that subset hooked me so bad I had to master collect the entire set, some pretty nice vintage in the other subsets too!