Most of the Lakerfan don't come to the Spurs side of the forum, only a few so there won't be many responses from Lakerfan.
Laker fan is pretty honest about weaknesses, often pessimistic even with a loaded roster. Feel free to ask and you'll get more information than you want to know. I've never known a more pessimistic fanbase even when the going's good.
The reality is the Lakers aren't really that good, they shoot some shots, they made some shots. Some were fluke shots, other's were lucky ones.
Some Laker weaknesses I could quickly think of:
1) Defensive PG. Everybody knows you quick little PG's can abuse the Lakers PG. I'm talking to you Aaron Brooks, Jameer Nelson, Tony Parker <insert waterbug PG>
2) Soft Defense. Major problem in 07/08. Inconsistent defense last year.
3) Taking games off.
4) Charlotte Bobcats own the Lakers.
5) John Salmons owns Kobe.
6) Lamar is inconsistent cuz he eats too much kandy.
7) Derek Fisher is a little too buff
8) Machine was broken
9) Farmar's ears are kinda freakish big, as is his ego.
10) More? Just ask or propose a weakness and you'll find a Lakerfan that agrees.