Gambit chains are an underutilized tool.
No, they're really not. Gambit chains are stupid. You don't
ever want to use gambits from shortest to longest, and you shouldn't encourage that. It runs counter to the whole concept of gambits.
The idea of gambits is that your biggest gambits are highly efficient (in terms of effect over cast time, including build time (but not effect time)), and your smaller gambits in the same class are progressively less efficient.
If you want to do a bit of damage, you can do so very efficiently--hit three big DPS gambits and you're done. That leaves you with 20+ seconds of spare time in you rotation; you can use that time to heal, or move, or debuff, or whatever. But if you don't want to do any of that, if you want to do a
lot of damage, you can fill that time with more DPS gambits. Since your bleeds don't stack, you don't get to use those highly efficient gambits again (if you could, you would have too much DPS). You have to use smaller gambits, instead. So you go down the list, casting weaker and weaker gambits, until you're reduced to Precise Blow or whatever. (In practice, of course, people work out the smallest gambit they're going to get to, then order their gambits for efficient mastery use, which isn't necessarily largest-to-smallest.)
Because of this natural progression of gambits, wardens are most efficient when combining different types of gambits--a few big healing gambits for very efficient healing, a few big damage gambits for very efficient damage/aggro, and so on (this was the basis of warden solo performance, as well--this, old DC, and 100% partial BPEs). In theory, anyway. In practice, healing gambits on DPS wardens are so weak you might as well not bother, and vice versa for tank wardens.
That is something that could do with a change, but not through gambit chains. Gambit chains suck.
(Now, if you want to re-tool gambit chains into a "set bonus" for using different gambits in the same class in a short amount of time, that could be a thing. But ordering them from small to large is stupid.)