I jumped from a Canon 7D to a Fuji X-T1, mainly due to wanting a lighter travel kit. I'm not a working photographer however, just a hobbyist. The X-T1 is advertised as being weather sealed, but I've yet to test it. They only have a few weather sealed lenses on the market though (noted with WR). I haven't tried macro on the X-T1 yet, but any nice macro glass should be adaptable if you focus manually. Fuji does have a 120 f/2.8 macro on their roadmap for next year however. The 18-55 kit lens that you can get with the X-T1 is actually a very nice lens, f/2.8 - f/4 with IS and very sharp. The build quality it is great on it. For wide primes, they have a 23/1.4, 18/f2, 16/f1.4, and 14/f2.8. They also have a 10-24 F/4. Their fastest lens would be the 56 f/1.2. These are all just Fuji offerings as well. There's also Zeiss glass in the X mount and other 3rd party options like the Samyang / Rokinon manual primes. As you've noticed, the flash thing is easy to get around if working manual. I was using my YN-622C triggers w/ the Fuji setup and cheapo manual speedlights until recently.
My current kit is the X-T1 with the 18-55, 30 f/1.4, 10-24 f/4 and a bunch of random adapted lenses in M42 and FD mounts. The Samyang / Rokinon 12 f/2 is on my list and possibly the 100-400 when it releases. I miss my 7D and 70-200 2.8 IS II for sports, but that's about it. It was getting too short anyways with the kids progressing to larger fields. You can checkout Fuji's lens roadmap here -
http://www.fujifilm.com/products/digital_cameras/xf_lens/roadmap/
For a size comparison between the 7D + 35 f/1.4 and X-T1 + 35 f/1.4, check this out -
http://camerasize.com/compact/#154.484,520.408,ha,t. That was my biggest reason to switch. I was debating a 6D, but anything other than the 50/1.4 starts to get too big again.
If I had any gripes on the X-T1, it would be the aperture rings on the XF lenses are too easy to bump. I've found myself many times bumped down a couple of clicks if not paying attention. Overall though, I love it. No regrets as a hobbyist. If was a sports or wedding photographer though? I'd wan't my Canon gear back! Just feel I can work faster / more efficiently on a full DSLR. Be it ergonomics or muscle memory, but that's just me.