I see what you mean, I suggested it because it has a pretty healthy strong line up and besides it will give us more grass events to predict for. Balancing the schedule surface wise a bit more.
the grass season is very short and so there are less tournaments. I know what you mean about Queen's popularity but we have the French just before and Wimbledon just after. That's 4 weeks of running rtr. The organisers cannot and should not be expected to run another rtr inbetween the 2 grand slams.