Having vast acknowled of the modding tools means nothing. AFAIK, the devs don't even use the modding tools for the live game, they use the their internal SDK.
Manners, a good sense of judgment, perfect acknowledge of units and ability stats, an analytical mind, respect trust of the whole active community and practicality are the characteristics which count.
Extended the list.
2 or 3 guys, who are not fully supported by the active community, is too small.
Additionally, introducing more people would ease up the stress on the current team and improve the decision making process.
Would it?
The community will never agree on whom would be ideal for a private alpha.