Reading your post again, I noticed this interesting requirement. I've been playing with this idea too, but what I saw as the ideal solution just did not work as intended. And if it would have worked as intended, then only upon connecting the XLR. The idea was to have two P-MOSFETs in series with the emitters of the Schoeps output BJTs, which would slowly turn on after a few hundred ms when phantom power was applied. The resistors in this circuit would be in the MOhm range, so the DC voltage on the signal lines would initially drop just a few mV by the load of the Mohm resistors, instead of jumping from 48V to, say, 35V or less. Once the MOSFETs start to slowly turn on, the mic will continue to power up. Guess what: it did not help. The plops and clicks were just as loud as when I hot-swap other mics. Maybe charging the 1nF RFI suppression cap on the mic output was already sufficient to cause the plops and clicks, I don't know. Anyway, this idea was short-lived. But it does make me curious as to how you are trying to solve this issue. If you don't want to tell and keep this as your little engineering secret, no problem.
Schematic of my flawed circuit depicted below, so you get the idea. The 4.7 MOhm resistors connect to Vdd, so when the MOSFETs turn on and Vdd starts to rise, it will slow down turning on the MOSFETs completely. Basically, this worked, but the clicks and plops remained... :-(
Jan
Less work for me, and more flexibility for the users 
Especially in the cases where there might be some tone-shaping part values to select "by taste"...
