Originally Posted by
Reverent-One
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Why should he feel excited about not being able to explore the unknown anymore? What glory is there in being fated to die, and to die for such a minor thing (as far as the scales the Doctor is used to fighting at are concerned)? And given how unlikely we are to see any of 9/10's companions again (other than as a Hologram on the TARDIS anyway), I wouldn't call getting closure there unnecessary at all.
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The excitement of what the next form will be. He did want to be a ginger. And the glory is dying for Wilf. Isn't that just as glorious to the Doctor as saving the planet? All life needs to be saved and all that jazz.
As to the scenes unnecessaryness, we already had closure on the last finale. Rose had her other Doctor. Martha clearly had her purpose and Mikey walking with her and Jack implied that he final found a group to be a part of.
What we actually got out of the sob spree was: Jack likes to bang men (that was important), Martha and Mikey were together for some reason (that comes out of nowhere and doesn't actually mean anything), Rose is still off being Rose in another universe (no change or anything really, just another scene), the only character who really needed some closure was Donna. With her we found out that she got a husband and is about to go on with her earlier boring life (so... nothing buggering changed, but now she's married).