Let's pretend that they can't slow down (which they can,
they said so themselves they decide the game's timeframe, but let's pretend), and that they care about a minority of nitpicky fans about how long the games take (they don't), still I feel GF has ignored or even got in a way of potential workarounds that'll let them have a game longer in development. Simply put, hire 3rd party companies to make side games to fill the void if they MUST make a game every year. GF aren't ever going to let a 3rd party make a main series game, but they've let plenty make side games. Why not set an initiative where they, say, let two other companies develop a side game that will be the "main attraction" for two years in a row giving GF about 3 more years of development time.
I'm guessing this thought is toward the GEAR Projects and the failure of Little Town Hero? Yeah, that's a steep hill to climb and I do feel bad for GF that, though they also don't help themselves when they refused to change their development cycle.
Little Town Hero feels like a side project game stretched to be at least a double A game, given triple A marketing, but given no extra time to have its mechanics more thoroughly built upon, graphics to be more polished (& coming up with a system to make the non-major NPCs be different models), and story fleshed out (at the very least so that that you reach the story ending and not a "to be continued"). If GF REALLY felt like LTH had a strong franchise opportunity, what they should have done was develop it over time for a few years with little to nor corners cut. But, whether because they refuse to change their development cycle methods or were desperate to have a new franchise to focus on (or maybe a combination of both), they rushed LTH making it have the same shortcomings are modern Pokemon games and, well, if I want that I'd play a Pokemon game. They themselves ruined LTH's chance, and that's something I can't feel sorry for them about.
As you said, these thoughts are complicated and are as much about the developer as it's about the franchise. Especially a franchise that has a complicated ownership on top of everything else.