One of the benefits of removing the switch and body is that the weight of the cartridge comes down to around 10 grams or less, so it becomes available to many more arms than the XX-1L was.
The exposed copper should not suffer from any problems provided it's been treated properly by Dr. T. I would be surprised if DV provided a product that would die prematurely.
The exposed filaments going to the pins is scary, just as they are on the Te Kaitora, but the rear assembly of the new XX2 seems much stronger than the standalone back plate of the TK. I know of someone who broke the backplate while fitting the cartridge to his deck once. It had to go back to Japan to be fixed. The XX2 has something for the back plate to lean against and take the strain.
As to cleaning the stylus, opinions vary on this issue. I have always used DV's big brush to clean it since that's their way. I've heard people whose opinion I respect comment about blowing vapour onto the windings instead of cleaning the stylus properly with a brush. I've had no problems with my Te Kaitora, and can only assume that the windings are treated ins some way to ensure that they don't oxidise, and that they are OK in being handled etc.
I still can't get over just how good the Te Kaitora is - and I've had mine for 16 months! (I really ought to get around to selling it on sometime.)
Regards,
Frank.