We need a Mech Select tab that includes the following features...
Customizable Icon Display, Left Side: Different types of players need to display their Mech icons in different ways. Wall-of-Mechs, drop down menus, weight class, Clan/IS, etc should all be possible and the system needs a way to remember player preference so we don't have to reconfigure the display every time we pull up a Mech Select screen.
IMO, the best option would be to allow players customizable tabs on the Mech Select screen. Let players name the tabs how they wish and sort Mechs any way they like. I'd like to put all my stock Mechs on a tab together, some folks would like to have all their invalids on a tab out of the way, or make a tab of 'favorite' Mechs, etc. You could even monetize this by giving people 2 tabs to start with and buy extra tabs with MC...
Mech Model Display, Right Side: When we click on a Mech icon we should immediately be presented with a model of the selected Mech, just how it was in the old Mechlab tab. You want to sell us colors and skins for cash, but make us go through a series of clicks and a load screen before we can even see the model? The artwork of these models is among MWO's greatest assets and needs to be at the forefront of the UI. Many players associate their Mechs with colors or visible loadout features rather than reading tiny text. The other tabs like Skills and Store need to follow this same design.
Next Click Mechlab or Play Now: Once we click on a Mech icon, the options for taking the selected Mech into the Mechlab or into a match should be immediately available on our next click. The old 'configure' button on the Mech icons did a good job of this, or you could put a 'Mechlab' button beneath the model presented, but if you want to keep the Mechlab as a separate tab, that's fine too. The Play Now button needs to be on the Mech Select screen though.
WTF is the Home tab? For the tiny amount of unique information/function available on the Home tab, it makes me wonder if this tab could be merged with a new Mech Select tab. It looks like a wasted tab that could be utilized for a better Mech Select function as described above.
The Bottom Line: I want to log in to MWO and immediately be on a page that displays all my Mech icons as I have chose to have them displayed. I want to click on any icon and be presented with the model as I have customized it. Then if I want to reconfigure that Mech, I want a prominent Mechlab button/tab to take me to the Mechlab UI. If I want to just play a match, I want the Play Now button on that same screen I selected my Mech from.