Assuming the ASICs are successfully repelled from the network, yes. The higher the hash on a network, the more spread out the rewards are. If ASICs are mining with 98% of the network hashrate, then they are taking 98% of the rewards, leaving the meager remainder for those who are mining with GPUs and FPGAs. If all ASICs are removed from the network, then all the rewards go to the miners who remain. Having said that, the loss of the ASICs will drive difficulty down rapidly, which will cause Ravencoin profitability to increase, which will bring in additional GPU miners back onto the network. That will in turn drive difficulty higher again, which will reduce the profits to all miners. This is standard behavior of all Proof of Work
blockchains. It would be a very successful outcome if more GPU miners return to Ravencoin.