A party select screen would be awesome . Although if you kick Shadowheart out she leaves your camp completely XD, party select screen wouldn't help with that :P.
Of the current party? Ive removed her a bunch. Does she have a "leave, and also dont come back" option?
What is the problem you are solving? Does your proposed change solve the problem? Is your change feasible? What else will be affected by your change? Will your change impact revenue? Does your change align with the goals and strategies of the organizations (Larian, WotC)?
. Although if you kick Shadowheart out she leaves your camp completely XD, party select screen wouldn't help with that :P. 