On the contrary, the stripped brewsters made very leathal fighters with the new and lighter equipment.
They would suite main enviroment perfectly since most fights happen below 15k. Basically brewster would be a great turner (almost like a6m) but with a medium dive ability and little tendency for compression. That and 4x.50 guns and relatively good durability makes a nice toy to harass late war planes. It would be slower but with proper tactics and E management it would be a serious danger to faster planes. When BW pilots were in distress they mostly made a vertical dive to the treetops. Because BW had great dive handling the enemy I-16, La-5 or yaks couldn't follow or augered trying.
The late war 109's made brewsters pretty much obsolete on high altitude interceptions but they continued in low alt missions throughout the war. Did you know btw that the finnish g-2's and g-6's were stripped of WEP equipment? That made them lighter and better turners. Planes with pods were sometimes also stripped of the nose cannon (G6) because the added weight made the plane too nose heavy.
In that sense the G-2 we have with finnish markings is modeled wrong. It should be 110kg lighter but lack wep.
Late war brewsters had a slightly improved armour (pilot seat was plated from the back.)
