The Tavor has ejection ports, one on each side of the receiver. However, you have to partially field strip the piece and reverse a part to change ejection sides.
If you’re left handed, fine, but if you’re in a firefight, that’s not the time to disassemble your weapon just so you can shoot from left side cover.
Corners don't provide any useful cover except concealment because corners are the easiest part of a structure to shoot through. That's why the modern tactic is to 'slice the pie' and never place yourself right where two surfaces meet in a corner. Another bad thing about corners is that they enhance the enemy's sight picture of you. Enemy bullets also ride down walls pretty well if the deflection is shallow, so it's never a good idea to shoot from a stationary corner in MOUT. Either get to the roof (best of all options), or go through the building from the inside creating a breach if necessary.
Bullpups are designed to facilitate entering and exiting a vehicle with haste.