I had a brainstorm and I thought it might be interesting.
What if instead of the regular WT/Soak system, every hit was a crit, and Soak simply reduced the roll?
Of course, a ton of stuff in the game would need to be rebalanced etc. (for one thing, minions would need an overhaul) but what do you think the effect would be if every successful attack simply resulted in a roll on the Critical Injury table?
You'd keep ST though, which means that a result of 1 would always mean you take 1 Strain, which always pushes you towards unconsciousness, in addition to probably adding a "You drop unconscious" crit result. This would mean that there is a certain fear even with durable characters that a hot roll could really hurt them, rather than a pure numbers game.
But each crit you get still puts it at +10, and some weapons would add extra to the roll. It would also greatly, greatly simplify weaponry and give more niches because pretty much all pistols would be the same, then all carbines/rifles would be about the same, then all heavy rifles/light repeaters would be about the same. You'd keep some qualities, but you'd be able to drop a lot of them.
For some ships, this wouldn't work all that well, but I actually started off thinking about it in that regard. I think it might be superior to the current system for Sil 4 ships. What originally made me think about it was WWII era heavy bombers like the B-17. You know, engines 1 and 3 out, tail gone, half a wing missing, and they manage to limp home somehow (okay, I may be exaggerating. A little bit). But I was picturing a chase with a few starfighters and something like the Millennium Falcon. Shields are barely hanging on, stuff is falling off the cockpit consoles, there's a fire breaking out somewhere, but the ship never actually gets destroyed destroyed. I think that's more interesting and dramatic than just Hull Trauma, especially since the ship's engineer can only try to repair that once per encounter, and then you're screwed.
Related to a lower need for multiple dice to generate high effectiveness, I'd also suggest introducing the Genesys cap of 5 on Characteristics, possibly revising it to 4 natural with 5 enhanced, comparable to the current 6-7.
All in all, implementing something like this would probably come with a very large slimming down of the entire system, compacting things in a major way.