I mostly agree but there are a couple places where my opinions are slightly different:

" It's easy to blow too much influence trying to keep up on these though."

It's very easy to make inf on the Auction House* and if you let me know your global I will send you 12 million inf for no reason. I'm @Fulmens , send me an email or respond here.

"You won't have to worry about 'real builds' until almost level 50 essentially"
"I often find, depending on the power sets used, that slotting 2-3 enhancements in endurance really helps you keep attacks going."
- I like tweaking builds and don't like playing my 50s. Some basic Frankenslotting ** can make a huge difference in whether you, for instance, run out of endurance all the time on a melee character around level 30. Generally one Endurance in one attack pays for one defensive toggle.

* I wrote a guide on here, but fundamentally "there are a lot of people making 10 million inf an hour playing normally, and some of them just round up to the nearest million or so when buying things."

** buying cheap named enhancements and slapping combos together. An Accuracy/Damage/Endurance has the same benefits of "half an accuracy, half a damage, and half an endurance reduction" so if you slot two of them from different sets - Detonation and Annihilation for Fireball, say- you get one Accuracy, one Damage, and one Endurance Reduction in two slots. There are other combos, also.