Has it been that long? I always thought of Tarantulas as one of the more iconic bad guys in BW. Sure there was Megatron (leader), Blackarachnia (token bad female), and Waspinator (comedy relief); but Tarantulas was the truly mean one. He struck me as a cross between G1 Shockwave and Starscream, where he was like an evil mad scientist with his own dark agenda.
I think Hasbro likes to focus on G1 in their Generations lines because the IDW comics makes them easier to sell. But I wish they'd include characters from other continuities into their Generations lines, maybe one or two BW characters and one Unicron Trilogy character, or something like that. Just to mix things up a bit. There also doesn't seem to be much diversity when it comes to alt-modes. In what we've seen in Siege so far, most of the characters turn into automobiles. Would be nice to see some more dinosaurs, birds, spiders, etc.