You'll see this said plenty of times for many of Maria Hill cards, but she really pulls cards like Surveillance Team and Tac Team out of binder fodder status for her. Having cheaper, higher token capacity cards allows her to re-load her "hover carriers" more easily. It's also a better use of cards like Reinforcements to load them up 2+ lesser supports and move those tokens over with reassignment then to just put a single token on her behemoths.

I understand the move to have her in Leadership for her pre-con, but look to see a lot of deck builds for her in Justice, and even some in Aggression and Protection. And the way I am reading her deck-building exception, if you aren't using the Helicarriers, she can include a playset (3) of the other supports, allowing for a lot of deck building variance. For those of you playing multiplayer, getting Med Teams into her deck, regardless of aspect, will give you a lot leeway with what you can accomplish for the team, as she has cards that use those med teams for thwarting and damage, in addition to their base ability to heal and provide "battery" charges for the Helicarrier supports from her pre-con you decide to keep.

Field Agent is going to be an invaluable card for many builds for her in any aspect as she makes ALL your allies into SHIELD allies. I can see most decks going one of two ways with her: spam lots of support and only use a few allies as mostly blockers or for their special ability, and then Ally heavy decks relying on Field Agent and cards like Teamwork and supports like Inspired to keep bodies on the table and firing away at high capacity with "Voltron" primary or secondary strategies.

Finally, as she is a Spy, she has access to Breaking and Entering and Espionage on top of all the Shield supports and allies operating just fine from Alter-Ego. Look to her to have many decks where she can just hang out away from the battle coordinating from "afar", utilizing that 2 extra cards (the second from her exhaust ability) to counter balance whatever scheming is being done. Just be aware if playing like this the lack of the "SHIELD" trait that will be on your allies most of the time who aren't sporting it already.