My only problem with the point you are making is that the season is only a few games old. Therefore squad size should be irrelevant at this stage. Having a squad of 25 senior players wouldn't have helped us beat stoke or spurs as we can only field 11 at a time.
Our first choice starting 11 is probably as good as most in the prem.....so the problem must be......the manager?
Your obviously correct , 19 is too big a squad we should only use 16 !
So Skrtel is our 1'st choice right back & Lucas is 1'st choice ahead of Steven Gerrard ?
If we had stronger options within the squad of course it would have helped us get a better result against Stoke Sunderland & Spurs .
Or are you trying to say that Lucas is a better player than for example Schweinsteiger or that Skrtel is a better RB than even Alan Hutton ?
If you cant see that having a bigger squad makes you a stronger team then theres no point in talking to you .