So the thing is you can get to 31 now with Vendor gear. Personally I don't think it is too big of an ask to have people invest some time and level up Vendor gear before raiding. I know that you can clear VOG hard as a 29 with no issues, but it is really so easy to get to 31 if you just invest a little time. You get Eris gloves basically for free so you just have to buy 2 pieces of vendor gear and 1 exotic from Xur you are good. Assuming you get level 30 gear from VOG you would just be replacing it anyway.