Okay, I brought up these rules to our group tonight and we decided to implement them since we were running as a party of 3 until now. Here's the breakdown. I really enjoyed the results.
* 7th level characters *
Elf Paladin who gestalted into warden
Eladrin Rogue who gestalted Bard
Tiefling Warlord who gestalted melee ranger
After some roleplay, it was time for combat. I threw them up against the 8th level angel encounter in the Monster manual. The fight was very even in that by the end, each member of the party had been bloodied at least once. Our Paladin/Warden was reduced to -3 by the bloodied angels, but regained his surge value of 47 hit points as an immediate reaction utility and finished them off with help from the rogue/bard on the following round. He then used Lay on hands for the second time (out of 4) in the encounter on himself since the other two had used their healing powers on either him or themselves.
End result was that each had used 2 or more dailies and their encounter powers with the odd utility here and there. A pretty consistent fight, imho.
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Ultimately, this clenches it for me. My Party and I enjoy these rules and will be continuing the campaign using them.