I think that this is an interesting situation for LJ to consider that highlights the very fine balance between competition placing pressure to perform as opposed to raising the level of a players performance. Everything about Cisak's demeanour suggests that having a number 2 brought in of Boozy's attitude and personality would place pressure on him that would not benefit his performance, and the seeds of this issue trace right back to the signing. Dickov must have been aware of this which suggests that either he didn't consider it to be an issue for Cisak or that he expected him to leave in the summer with Boozy in as number 1. When neither assumptions were correct, there was always a chance it would end in this manner.
As LJ has been vocal about doing his background checks on players attitudes and characters then I assume he will not repeat this mistake. If he is going to have an openly competitive situation between the keepers he brings in this summer, then both must be aware and responsive to this environment. To get the best out of a character like Cisak, I would imagine he needs to feel secure in his shirt with an experienced and competent number 2 who is aware of his role but who could perform to a decent standard if necessary. As an example getting Brad Friedel to fulfil this role at Spurs was a major achievement for AVB, and has allowed Hugo Lloris to claim the shirt and become comfortable in his role.
To be fair to LJ, everything I have seen suggests that he is aware of this and I fully expect him to get it right. Sadly for us and Cisak (who is a talented young keeper who was superb until christmas last year), Dickov got it wrong, and by the time LJ arrived was damaged goods in need of a fresh start. As such he had no option but to go with the hot hand in Boozy and hope to get through the season before addressing the situation, which he now has!!