It would make more teamwork. Right now, people don't care if they die often times, cause they can recon. 2v3 with recon is as good as a 3v3. (assuming its good recon)
It'd make people probably play more "camping" because they are afraid of getting intercoursed by revive caps, but it would allow for way more outplay potential. You could take risks more.
It would involve way more thinking, and learning how the opposition plays.
Unfortunately, DP is pretty dead and its pointless right now.
That being said, Recon was also one of my favourite things about DP because it's what made people forced to go on voice communication, and talk, which caused a lot of enjoyable times in DP. But, I think recon removes a lot of potential strategy and skill.