Yes it's sad to see Mavic go but honestly just from a point of romantic nostalgia.
Practically speaking I was always happy to see a neutral support company that wasn't run by a component manufacturer. It helps them be "neutral". While I have witnesses SRAM neutral being actually neutral (only throwing in the occasional "ewww...this bike has wires" comment) I have witnessed Shimano support being anything but neutral many times. I have seen them lacking in the equipment the riders need multiple times and their response is usually "well you should have been on Shimano." That's BS.
I am sure they will be better at the tour level because they have to be. A lot of the drivers and mechanics will be the same people that were doing Mavic support to be honest. That said I truly think it's a step down for support in the tour.