1. The M2, M2A1(-), and M2A1 all could swim. I personally swam one as a company comamnder. With the M2A2 ODS and on, the Army got smart and dropped the firing port weapons (THANK GOD!!!!!) and added additional armor. It was recognized that since we were no longer going to have to fight the Great War III in Europe the swim requirement was dropped from the MENS.
2. The Army has procured 7 BCTs worth of Strykers...that's it. No more planned. The M1206 ICV will replace the M2.
https://www.fcs.army.mil/systems/icv/index.html
3. Drink beer instead of chocalate milk...lets you think more clearly.