I'd highly consider at least watching a game of Blakey with Lloyd before making this move.
I love Blakey but Lloyd is a very significant piece of information. He looked great last week, took the majority of kick-ins, kicked just about perfectly, didn't get injured and lose a quarter and still only scored 98. Lloyd is going to steal most of those kick-ins I would bet, he'll also steal a few touches from him.
Heeney is a sound pick, durability is his issue but otherwise he's going to be a keeper level forward and if his role from last round can hold up he's going to be better than that but I would also hazard that Parker playing forward so much was more a hot hand than a plan, Heeney did rot up forward until Parker started kicking goals like he's Gary Ablett Sr and then stayed forward for the majority.
Also worth noting that Sydney played just about perfect last week, if we play at that level all season we win a flag, so there's definitely some regression to the mean for the whole side on the cards.
That said, I'm ready to cull Ridley also