I just got a 1400 for my bday(first router ever) and it's been awesome to use. With the guide rail stop I can line up on a plywood panel to route a dado. No worries about shelves being slightly off - I can cut all three sides of a cabinet in one go.
And no need to lug a huge sheet of plywood onto my dinky tablesaw or setup dado blades.
Kind of the same principle why I really like the TS55 vs. using my tablesaw. It's just so much easier for me to setup and use.
Edge profile has been pretty easy as well - IE 1/4" roundover bit. The 1400 has a super smooth start and plenty of power. It hasn't jumped around on me unless I did something stupid (move into wood before full speed).
Where it gets a little challenging is if you're standing it on a narrow profile like the edge of 18mm plywood. Trickier to balance vs. cutting from the face of the plywood. However, with a little bit of setup you can rig up another board on the side of your piece to give the router extra support.
If I had money/space for multiple routers I could see where a little panel router would excel at the 'on edge' routing. Otherwise, the 1400 seems like the winner to me.
The removable dust collection is okay... as long as I remember to install it before I install some of my longer bits...

Otherwise, dust collection works well with my CT26 cranked up. The chip collector that attaches to the bottom is kind of a pita though. Easy to clunk into corners if you're trying to work in a tight spot like a drawer box.