You have to understand that cards do not exist in vacuum. Your deck needs a plan. Tinkertown is in the deck because it has nice stats (the same as BT) and because it has great synergy with Antonidas.
Of course. The plan for all decks is the same: win. How? Synergy and value. Blackwing Technician has synergy with dragon decks, and the value it provides is its stats that will often trade two for one. It's about gaining advantage on the board. It doesn't need to have additional synergy with a single
class legendary to make the cut.
Are there other 3-drops that do more? I would argue that Muster does a lot more than technician, it has synergy with Juggler and Equality for example.
Yes, Muster for Battle has great synergy with Knife Juggler and Equality. That doesn't take away from the value that Blackwing Technician offers. What's more is you're comparing a neutral card to a class card, which of course is going to provide more umph in nearly every scenario. Even further, we're talking about dragon decks. Muster for Battle and Knife Juggler in combination simply have no room in dragon decks. Other synergies? Sure. Doesn't detract from BT.
The first instinct is to just slam all dragon cards into the deck, but I suggest you sit back and think for a moment what you want to do with the deck and what cards offer the best value for that plan.
It's a bit laughable that your conclusion to others speaking highly of Blackwing Technician is that they're neglecting any sort of gameplan and are ignoring proper thought. The plan is to win, like all decks. How do you win? Value. Does Blackwing Technician provide value? Yes.
Feel free not to include it. You don't have to. It'd just be silly not to, since it's so solid for a three drop.
Seldom does Senjin get cleared with one card yet nobody plays that card either. Card quality is just so good right now that cards like Senjin and Yeti don't offer enough value when compared to shredders and the like. I would argue that BT falls to the same slot as those cards and is quickly forgotten.
You're comparing a 3 drop's stats to a bunch of 4 drops. Of course Shredder is preferable to other four drops. The fact of the matter is that there's not a 3-drop equivalent of Shredder. With all these cards, Blackwing Technician stands on top as far as three drops go--neutral, non-legendary minion.
Denying its value is just silly, but you seem set on it for...some reason. That's okay. Pass up on it, but you'll be seeing a lot of it in dragon decks.