I really liked what they had going throughout Prime Wars, and just wished they had more of a retooling budget. There was a steady stream of neat little Legends class molds, and even the quick redecos like CW Windcharger got better redos later on. Plus with TR on they started having the additional functionality of being able to carry Titan/Prime Master sized figures. It just seemed like a decent compromise rather than "let's make Deluxes but make them smaller/shorter" -- here's a price point meant for smaller, and the Deluxe space gets freed up.
I was delighted when Micromasters made a comeback, and again the format seemed perfect. Minibots going to Deluxe? Okay, let's use this price point for 2-packs. The idea of eventually completing a few Micro teams (or at least touching on a few), and it also being a venue for cassettes, was so great. Maybe even some Mini-Cons down the line for when they'd get to Armada homages. But apparently retailers didn't want it, so back to Core? Asinine ending.
I don't necessarily dislike the Deluxes they've made since then (some still seem unnecessary due to how well the earlier version nailed the design), and sure, it's nice for them to be able to do more with that budget. But it's been a rough few years for the price point.