I think it is probably time to start revisiting the whole idea of bards mobility leading to a huge advantage. Early on in the game when we were all learning the fights then undoubtedly bards ability to spam attacks was a significant advantage. Further down the line when we are mostly better aware of the timing in fights and when to use abilities and which to use I think it is possibly less of a clear advantage.
I main BLM in 2.0, in 1.0 I started as LNC main and eventually wound up as MNK main so have some experience of both mellee an ranged dps. Early on in 2.0 I did find that a similarly geared bard would out dps me primarily because of the mobility factor. As time has gone on though I feel that has changed. Knowing when and where to cast which spell has made a huge difference in the lack of mobility. The reason I think that a lot of BLM still under perform is the rigid sticking to the accepted rotation.
An example would be against the wall in AK. Some BLM would wait for the next move before casting as they didn't have time for the long cast before the blue goo moved, or would start casting it and have to move mid cast. As we learn better we know when we should be throwing in a scathe or using that little gap to use another ability.
This situation is probably true of other jobs too, as we learn fights and our jobs better then the ease of use of bard may become less of an advantage.