There are two reasons to leave the mech lab, to drop in the training grounds, and to use the pilot skills.
If the mech lab had button right next to configure that said "mech skills" it would be great. That way I could jump right to the skill tree for the mech I am using instead of backing out of the lab, opening the skill tab, and hunting down my mech in the skill lists.
If the training grounds button was put at the bottom of the match mode selection menu I would be happy. Then I would just have to hit my match drop down menu and hit training grounds, instead of backing out of the lab by hitting the hope tab.
That is the only reason I exit the mech lab, other than dropping in a match or opening the social menu when in a group or managing friends list.
Edited by Dirus Nigh, 17 August 2014 - 04:47 PM.