Um...Turkoglu is still a mismatch on Ariza / Walton, and Lewis is still a mismatch on Pau, although that has positives and negatives for both teams.
If anything Pietrus should have an easier time with Kobe because they are closer in size (LeBron is a lot bigger than Pietrus in terms of height and build).
And I'd say Howard is a mismatch for anybody the Lakers could throw at him, Bynum has the best chance of defending him well but he hasn't been all that great lately. Pau and Odom are too soft to contain him.
That said, Odom should still be a tough cover for them and Kobe is a tough cover for any team no matter who they have.
I'd say Alston > Farmar / Fisher / Brown and Johnson should be able to hold his own against them.