There are lots of ways to gear up at the moment. ST, Coil, Mythology, Soldiery, Hunts and crafted gear. I would even go so far as to say the majority of relevant equipment in the game at the moment is token-based or token-associated (i.e. ST gives-->UAT/Oils-->requires soldiery aka tokens).
If you want to only focus on Coil you can do that. But the devs have put in other avenues of progression, and your choice to ignore them is not a flaw in the game. It's simply what you decided to do.
