While they do operate on a budget and have a few programmers, they can and have added functionality to the engine that they are using. The engine is the Titan Quest engine, and they have a licensing agreement with the former THQ owners to use the engine and update it as needed. Crate has updated and did some more optimizations to the engine already.
Of course, there are technical limits to the engine and they’ve hit up against a few of them.
So if more will come is uncertain, it depends if it’s doable and if they have the budget/time to do it - whatever “it” may be.