I'm glad that you finally mention Mods. So your point here, "A fully modded T1 units are far superior than an unmodded T3", correct? Then revive that t1 unit still an option, which to be said, the common strategy of Syndicate is based on their Indentured.
And here, I will go a lil' further for the "IF". Subjugator weakness is their cosmite spent, this my point. So "What if" the "revive" ability is transfered to the Overseer? I'm fine "IF" with this new ability, the Overseer is 10 cosmite expensive.
Fun fact: Back to older AoW, "Revive" ability always been an annoyed and OP that was limited to certain races and tech. So I'm quite surprise here that you think they're not worthed attention.
And for Modding, what make you think the Subjugator don't have Sp and defensive mod? With Psynumbra Mods, ain't the Subjugator equal to the Tormentor with their 9 range AoE Mind break ability? A 7 hex if hit with Madness, Insanity is not a problem? Can Baron do that?
C'm if you go with mods, you would have various options, even a high atk sp unit. So to say, with decent mods, the Subjugator unexpected useful. Let's back to unmod unit, or we could go forever.
For the flank part, I mean the Subjugator can have the same chance with the Baron stagger atk, which have the enemy flanker swayed to your side. Let's go for another "IF" that flanker is a Hero with full points spent to Atk and Health, and a "Limite" Sword in hand. Man, do you really believe your Baron, in this case, could stop this flanker... or a Subjugator would?