(2) You have a soul. If you didn't, you wouldn't care about what happens to everyone else or send me angry texts about how callous I can be.
(3) I think it's more the influence of the presence and the nature of Wanda's powers being chaotic. It can have unexpected consequences, even if she's learned a lot about how to hone and harness the energies when she needs to use them. I think in its dormant state, if there was any will, the presence helped find a way.
(4) That means it will need removed. Not the baby obviously, but the presence. Before it wreaks havoc in other ways or fuses with it.