ESB batch #2 tasting

I tasted ESB #2 a week ago, and today. A little disappointing, though it is better now than a week ago. There are two problems:
a) The beer is very dry
b) There is a significant off-flavour.

I thought about it, and remember 3 potential problems:

1) Mash temperature was on the low side
2) Fermentation temperature was on the high side
3) Too much aeration during bottling

I think probably problem a) is caused by 1) and b) is caused by mostly 3).

Nevertheless, the beer is drinakble, and continues to improve.