mll wrote:
    Well, I did see this ticket, but it seemed to have fallen into oblivion. :)    
I hope it makes it to WinSCP 5.2 (I know, too late for you anyway).
    mll wrote:
    - encryption of stored passwords    
Do you mean master password?
    - more reliable for big transfers    
Does FileZilla drop big transfers or what is the problem?
    Two thing from Filezilla that I'll regret :
- easy file queue management    
What do you miss in WinSCP specifically?
    - tabbed sessions    
WinSCP has tabbed sessions.
https://winscp.net/eng/docs/ui_tabs
    - WinSCP's strange GUI while transferring (this modal window with this "minimize" button)    
You can make WinSCP use queue for all transfers, just like FileZilla:
https://winscp.net/eng/docs/ui_pref_background
Let me know if that helps.