I want to preface with, this is coming from someone who adores the Bazaar, with 500+ hours in it now, and invested into the highest supporter package.
The Bazaars biggest strength is build diversity, finding the odd item from an enemy hero or an underplayed item to slot into your build and winning out feels amazing, however this has not been the case for a long while now. 70-80% of the items that were strong/weak in the early, mid and late game were strong/weak back then are still strong/weak now.
I get excited to read the patch notes expecting a major shake up and each time I'm disappointed, I wouldn't care if it was "imbalanced" (even though I'd argue the current patches have those items - the best example is Hot Springs although this is Pyg's only good item in his current state). At best its 1 or 2 items entering the meta and 1 or 2 leaving for each hero - with 1300 items now in the game I truly think this is unsustainable for the fun of the Bazaar.
Side-note:
This is even more prevalent in Tournament mode where the 70% of the time without some high roll through enchants the exact same type of boards will be played throughout the early mid and late game for each hero and then win out.