Thinking things out...
Jamelia's primary defense against I-50-B31 at the moment is that Isobel isn't currently willing to go with the "retroactive consent" plan. (Her mission is to convince Jamelia to join up. She's apparently taking that literally, given she's currently sticking to social enhancement, and not mind control or force - i.e., actually convincing her.)
If Isobel was willing, Jamelia does not have the resources to win a physical fight, and I'm not sure how well she can defend against an overt mind control attempt. (Especially since she apparently doesn't have a mind ward up already. Can we have done that retroactively with Time 2? Anyway.) If we do want to get into a physical fight, we want to do it somewhere with a significant Sleeper population. Especially since Jamelia can run up walls without gaining Paradox.
The problem with trying to remove I-50-B31 by force is that, well, she might rethink the "retroactive consent" thing if she catches on to what we're doing. The problem with not removing her by force is that she might well get frustrated enough to do that anyway. (Simply refusing to listen to anything she says or trying to shut her up might be sufficiently frustrating. If whatever we're going to do isn't going to be done now, we're forced to give her the opportunity to talk.)
In the short term - since whatever plan we go with is going to require time and resources that aren't on-site, probably - we want to keep Isobel talking, rather than anything else she might do. This has the additional benefit of letting Jamelia pump her for information, and I'm quite sure Isobel knows some very interesting things. (Just, uh, let's not ask any questions that could be taken as asking to be inducted into the hivemind. That'd end poorly.) Some of that information might give leverage to convince Isobel to change missions, maybe, and if we can choose the right questions she might count answering them as part of turning Jamelia.
Trying to convince Isobel that Jamelia has already join the Technocracy proper - if we try to do this, specifically, we have to be very careful about it. Or Isobel might just go and produce a proper Control request for Jamelia's transfer. Again, that wouldn't end well.