I dislike summoning alot, I hope they don't add it, I like the combat as it is at the moment, however there could be some tweaks to make it more enjoyable; show many kills you have done every time you slay a hard npc (f.ex general graardor) this would be so handy for pvmers as they don't have to use notepad or any other writing material to count their kills.
if they add summoning ingame it would not be the same again, it will pretty much start becoming like any other rsps out there which i would like to be the last thing to happen to emps, the gameplay is so unique compared to other rsps, which keeps me online.