Your sides really developed, even though it is hard to say sometimes at this short lenght, I see there is nice improvement. Can't wait how it will look when you grow it out again, to compare it with your last try. 
Also I agree with what jumps have said about sideburns. Your look is really cool, but why not change the look a little bit, you will only add sideburns, the change will not be too drastic, but the result will look good in my opinion. Also no need to wait for buzz cut, even though it is more noticable when you have buzz cut, other hairstyles work with it well aswell, I for example have not been buzzed for a while and I think my sideburns are nice addition to my look nonetheless.