Now map your field\strat\port\vBase positions and see how Hitech responds. I found that he dosen't say anything if you have a sound development going. Keep posting and asking questions or comments about your work like I do to help keep yourself inspired. He will drop a hammer on you when you exceed his sensibilities quickly, and that is a great learning experience about how he sees his game. He wants you to succeed as much as you do because your finished product enhances his product experience for his customers. You have seen how the community responds to "new" terrains.
I have no clue what your dream is inspiring this terrain and what your finished image of it is. So go for it and follow any requests or directives from Hitech. Terrain builders usually don't interfere with other terrain builders because there are no wrong terrains, and Hitech will step in if you go somewhere he feels won't work for the Melee arena.
Just remember to live by a copy of the terrain editor manual where it talks about field spacing and setup. Tips for MA submission and make sure to get the rides enabled correctly for all field types. And the grid that is created by the make map, don't change the orientation of the grid lines to get rid of the upper and right hand border 1\4 grid space. Or you can let Waffle create the production CBM map when Hitech asks for your project files. Oh, tagging the three uncapturable fields, the function for doing that can be flaky. You usually can get the very first one tagged, that generates a (.fla) file you can edit with notepad. When you get to that point just ask about it. The AH2 wiki for terrain building has a section on feilds and describes setting a field as uncaptureable. You will see the numbering format when you then edit that file.
As you create spaces for tank combat, test them in person with a tank and use a stop watch for transit times. Seven minutes to get anywhere is about the longest time players really have a tolerance for in a tank. The more clever and complex you get, chances are the complexity will be a negative to players versus just getting out and shooting at other tanks. And the grass tile is your freind for opening vistas for tankers and at least 1\2 mile off the ends of runways. I do a mile to keep tank gun barrels out my pilot's ear when I spawn.
Looks great, keep at it, and have fun.