I agree with the theory that if it doesn't allow instant death it's good enough for a starting base. Even using qvm's (like Lakuta7's) that allow layouts I would never dream of making the bases impenetrable. On GameArena (Australian server) I've thrown a few random layouts around to spice things up, I get told they are wrong but when I press them with "Do you get killed right away" they back down and tell me that they are OK, it's just that they didn't expect them.