Well, you have been saying previously that all gates are connected airside - which is wrong.
I am glad you finally agree with my statement.
Amsterdam has a lot of direct service to a number of exotic destinations. Yes, Easyjet may provide you a shorthaul link to Adam to connect to these services.
I am sure I am not the only doing that.
The departure lounge 4 is a joke - you have almost none of the amnenities you got in the other departure zones. I wanted exchange some exotic currency back to Euro. Yes, I was angry when being stuck in that stupid M-gate area.

Moreover, I would think that some yotel customer are also Easyjet pax (Schengen) - not mentioning that detail on the yotel website is quite cheeky. I can only hope that security will allow you into departure lounge 3 with a M-gate boarding pass and a Yotel booking.

Further, I would be no problem to offer an airside connection between the M-gates and departure lounge 3. M-arrivals should be all clean, so they can be dispersed into departure lounge 3 without another security check. Only a entry and exit immigration checkpoint need to be installed. Since most checkpoints are automated nowadays, that should not be a problem at all.