I suppose the only issue I can see with putting your homeworld pretty much in front is that you really need to use your flagship to fight off the militia quickly. On usual maps, this at least puts your flagship in the path of a potential incoming attack. Here, you'd have to fly several jumps (wiping out all your antimatter in the process) while the enemy could already be wiping out your shipyards and essentially ending the game.
This would be an issue in early game only, when everyone's scrambling to colonize. You can't really send just your cobalts/skirms to take on the militia because you'll keep losing lots of them, and you can't send just your flagship and leave the frigates up front, because with the enemy flagship they'll get wasted..
So it's kind of a catch 22. You can't control the sun that early in the game, and you basically take a gamble. You can lose pretty much either way. If you use your flagship to colonize, they can attack and easily wipe out everything on your most improtant planet early. If you don't, you'll spend lots of money on frigates to take out the militia and it'll go much slower, while the enemy could've gambled on using their flagship and didn't get attacked, so now he's got a big advantage.
Just seems like there's too much gambling

That, and teams on this map will probably just all join up and hit one guy at a time, knocking out their home planet and moving on to the next. And most of the action will have to happen at the star, which pretty much eliminates any strategy