The "Lucas" issue only became an issue because of the manner of the goals we conceded against Chelsea and Palace, for the time leading up to that we were in great form and were overpowering most teams with quick, decisive play. So in essence, you saying if we'd played him we'd have won the league isn't necessarily true. If we'd played him would we have been as quick playing the ball out from those deep positions on the break? Would we have had the assists and goals that Gerrard contributed? Hindsight is great and all, but we were one of the form teams and one of the most exciting watches in Europe without him. The biggest damage our title challenge took was the injury to Henderson. *IF* we'd put Lucas on at half time against Palace, then maybe things would have been different. We gambled and blew it, we needed goals and were 3-0 up and flying, so I wouldn't blame us for being bold and thinking we could score more.
Let's not act like Lucas was the saviour of that campaign that we just didn't see, we were fucking AWESOME in the run in, aside from two games. The need for Lucas in the overall picture of that spell of form, was irrelevant.