being kicked or being ignored for being under the unwritten minimal light is not new to the raids but I'm 305 now and thought that was a decent light level, come on, the first several groups who beat this were under 300. "have Touch of Malice, Black Spindle and be level 3000000 or you are a scrub noob and shouldn't do the raid because we all are too good for you" it is so rare to meet a team that is ok with helping out someone get through the raid, and too my understanding there isn't even drastic changes to hard mode, people who have done normal basically already know how to do the fights, most of the strata aren't too different from normal to my understanding.
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Only people who have no skill need the high light level. I've done hard raid since I was 305 and have done hard raid with as low as 303 on my team. DPS does suffer a bit but it only becomes a real problem at oryx. By the time you get there from a fresh raid you should be pretty close to 310 anyway from the drops up until then.