Just think about it, 10 Shadow Moves means 5 combo opportunities (not counting corner combos that can go up to 4 in 1 combo) and neutral slide amps. I think it's viable. I believe it's nowhere near the overall damage output of Black Sabbath but I honestly believe that you should get more openings with this variation because of the slide move itself and because since your game plan is slightly different from Black Sabbath (at least mine is) you'll get B1,1+3 when you need it more often.
What I mean by that is... When I personally play Black Sabbath it's usually close range because we need our strings and combo starters to work so I find myself fishing for that B1,1+3 and 212 very often, which means the longer the set the less it'll work, makes sense, right? People will stop pressing buttons and getting caught all the time by that move.
When playing Seeing Double I can see myself comfortable in going for that easy "F221 into Slide" punish from mid range and "B3, Slide" also from mid range, so I'm less in their face and making them focus on my long range moves which in theory could open the "B1,1+3" game when you really need it. When I say "need it" I mean that it usually gets people at the first or second round of the first match but it usually stops working when you need to close the set. If you don't abuse it that much with Seeing Double you should surprise them in the end.
To be honest this is all theory, I don't know if it'll work like that but from what I've played and seen people react to Noob, it should be close to how matches will go in kombat league.
