After 2-3 days experimenting, I can say that there are enough alternatives to Claymore's miner. With xmrig, xmr-stack and especially SRB I can achieve stable 450-500 h/s for tahiti 280 cards, 715-750 h/s for hawaii 390, and 910-930 for polaris 570 and 580 cards (with the usual bios mod and overclock as for ethereum). I don't need Claymore' s eth miner anymore also. Xmr is more profitable than eth, and with the coming reduction of the eth reward the minig of eth will be near its end. Thanks to Claymore for all his job so far, but it is time to move on! 
I liked Claymore because you got that remote manager which shows you all the GPU temps and hashrates. And with XMR-STAK it doesn't work. You need to either monitor on the pool or monitor by the HTTP interface. You also can't remotely execute a reboot.bat file.
Yes XMR is more profitable but pretty soon people will discover this and switch over and the profitabililty will be the same between both based on the same power consumption. Just give it a few more weeks.
I will say less than a week... XMR difficulty go down just after the Fork but it is increasing very fast.