Let's clarify a few things.
Yes, there is enough space to put all the switches without rotations.
However, this breaks two things. One is PCB pins. Not rotating switches 90 degrees causes the reduction from 2 pins to 1, since the other one falls into the hole of the switch nearby. This is probably a minor problem, and I have a good workaround - a wire keeping the switch in place instead of the regular switch diode, so those who use no plate can make sure the switches sit firmly.
The other thing is the soldering pads, which overlap with the switch holes. You can see how this looks in the current rev. A board (caps-lock). This makes the connection much more fragile and some PCB fabs will refuse to drill holes which overlap, which shouldn't be a problem for me, since there were no problems making rev. A with one such case.
So, to sum up, we have a problem with mounting pins, which is a minor one, and with overlapping pads, which is a major one. The first has a workaround, so it's not actually a problem, the second one just requires a compromise.
I'm rotating the switches now, and I'll probably make as many not rotated 90 degrees as possible.