I thought Hot Toys hit their peak just over 10 years ago (around 2012), while settling into complacency when they got deep into the Marvel licensing with the first Avengers film and shortly later with Disney and Star Wars. They were good enough at what they did that they could cut back on everything like accessories, additional sculpts and even the quality of art boxes once they hit the big time and sold in greater numbers to a wider and more casual collector base. They surely weren't in the market any longer to innovate and push the boundaries of what could be done in the 1:6 market.
I noticed their products went from being diverse, exciting and adventurous to simply license-seeking and catering to major blockbusters. That's not to say they didn't produce some great figures and occasional interesting gems over the years, but the Hot Toys focus seemed to become less daring (daring being something they took pride prior to that time). Hot Toys went from being a niche FUBU kind of company of "collectors making figures for collectors" to a big license pursuer that merely flooded their own market with blockbuster toys.
Prior to all of this I remember when Hot Toys was quite aggressive about stealing innovation from companies like Enterbay - who first developed highly detailed and realistic sculpts, the moving eyeball system and even the Bruce Lee license. In the latter instance, they swiped the Bruce Lee license along with Enterbay's master sculptor, made 3 figures, then merely abandoned the whole thing within a couple of years. It's like Hot Toys was so aggressive that they stole and took over and pushed the industry to such a peak that a time came when they didn't have to try... or couldn't afford to try to be a real collector-focussed concept company any longer. They just became too big in a tiny market to care.
Clearly we can now see when new companies push the envelope that Hot Toys has to jump on the moment and try shamelessly to catch up within their own dominated market. Who knows, maybe they'll use their power and advantage again to step on toes and try to drive some of these companies out of the market by aggressively playing hardball.