The shield does occasionally get stuck in a wall since it does have an edge, even if it's not specifically a cutting edge (much like the difference between a butter knife and a steak knife), but yes you'd need someone like Thor wielding it to really make full use of its potential damage-inflicting capabilities (not that Thor would need it for that since he's already doing Shift-X damage with his hammer he doesn't need Shift-X damage throwing the shield, much better to keep it for defense).
I'm not sure if you could get the shield to fall faster than any other object would (Terminal Velocity), but Cap's been shown falling at that speed and used the shield to land on the ground unharmed. Hmmmm, now I'm reminded of an Avengers issue where Cap's shield had ended up in some plasma entity they were fighting alongside some aliens I think and after they forced the entity to self-destruct and Cap commented about going back for his shield the clueless alien goes on about was he mad to think some 'mere' shield would survive, only to taper off in his commentary as they find the shield unharmed at the center of the blast (although the STRAPS and paint-job were still inplausibly intact).
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