That's a very bold statement to make Phil and I don't know how anyone could be so certain. Once the loan window is closed, there's little or no scope for any team to change things about; if the team has a deficiency, it has to be capable of being addressed with the existing personnel. One bad, long term injury to a key player or a spate of sendings off could find any team looking for suitable replacements and if they're not already in the squad then it will be a big problem.
I don't know how big and well equipped your squad is but judging solely by recent signings, I'd imagine that there's not a great deal to call upon? That could be a big limitation to your manager's ability to "put things right" - however much you believe in him.