There are two things here - firstly, if this is really a loan deal, then I could only see that being viable as long-term injury cover, or for a team that is struggling and could do with a boost in a particular position which may help them avoid relegation or achieve promotion. As relegation is already done this season, that's unlikely. Helping in a run for a premiership title or a cup competition? Maybe. From our point of view, we are suffering with injuries in many areas, so if we could borrow a centre for a while, that might be a thought (not condoning what Sarries have done, and not wanting to support them, of course). Although, as it seems Quins were one of the prime movers in the information gathering that has lead to this sorry state of affairs, not sure they would want to come to us.
Secondly - permanent signing. Whilst you would hope that some of the players had the nous to realise that something was rotten in the state of Denmark Saracens, I am guessing that not all were on these megadeals. If there is an up-and-comer in the ranks who is looking for a chance to shine in the prem, and it really is a proper non-loan deal, again I'd be inclined to trust the club to make that decision and integrate those players into Quins. In this case, there are likely to be some question marks over their "stars", who really should have known something was up.
At the end of the day, we want the best for Quins. If someone like, for example, Isiekwe was available as a permanent signing, would we really turn our noses up at him, if he brought a benefit to the club and could be integrated into the squad?