Perspective IS weak. It may be a good way to get value out of a large hand, but Currency and Road Building do about as well, from a lower age, Reformation does so much better from the same age, and if you have such a powerful draw engine that neither of those are good enough for you, then it won't take you too long to get to Bicycle.
I like Bicycle better, it is so hard to disrupt. With Perspective you need to begin a turn with Perspective in play so you can get Monument and make it worthwhile at all, and that means you can get disrupted by Societies, Compass, Physics, Experimentation, and a couple other things. Bicycle you can just meld and immediately use, without any icon requirements whatsoever, without enough icons to share Physics, without even caring if shared Sailing covers up your Bicycle right away. The checklist is reduced to Machinery, Alchemy, and that age 8 or 9 thing that steals all but one card from hand.