They will release more in plastic Im sure, but these things take time.
As for SM being released first for this edition. Well the last codex was an attempt to make SM's usable in 4th edition, this is the same for 5th. Also the ideas taken from the DA codex (such as cheap rhino's), plus army layout have all changed, and the golden boys need all the nice toys to sell more models.
Personally I think its a good thing, and Im sure the DE and Necrons will get some Studio love in the next 18 to 24 months.
Your toast has been burnt and no amount of scraping will get rid of the black bits.