I don´t like skinny women. I prefer something to both look at and hold. Same thing with cameras.
A mirrorless camera, maybe with an LCD viewer on the back, hooked to my 600 with an extender ... Little less of a problem with an EVF, but still the size imbalance will be a problem.
Then you can add a grip, to make it more holdable and then ... you have the size of a SLR.
But you don´t have the issue of the flopping mirror ... But I have been using SLRs for close to 40 years and never ones have a mirror failed me, so can´t say that worries me much.
But I hate dust on my sensor and, unless there is something I totally miss, that must be a major issue with mirrorless bodies when changing lenses.
1DXII, 5DIV, 5DSR, 8-15/4L, 11-24/4L, 16-35/2.8L III, 24-70/28L II, 70-200/2.8L IS II, 100-400/4.5-5.6L IS II, 200-400/4L IS 1.4x, 17/3.5L TS-E, 24/4L TS-E, 35/1.4L II, 100/2.8L IS Macro, 300/2.8L IS II, 600/4L IS II, Zeiss: 15/2.8, 35/1.4, 55/1.4 Otus, 85/1.4 Otus, Profoto B1