Again i've to say: If your dead u shouldnt be able to do a thing. No buying! Maybe look at the items you want to buy, but no buying. Dying shall punish you and your team - else these games will never end. I dont like the Idea of a buyout. I dont like it in Dota, it makes it alot harder to end games due to this option.
We dont lose any gold for dying in the current state, so atleast a time punishment/loss should be there.
Skill shopping is something diffrent, would be cool. Specially for beginners, so they can re-read the skilltree a little more while their dead^^
So long,
Aspartem