I'll not answer anything more. This could lead into another argument that would cause too much trouble than it'd be worth.

There are blindspots, and it's best not to let them sit. The longer they are somewhere, the more and more likely you won't be able to take them out. Think about this:

They are very good defensively. Try to take their planets, and you'll be up for a long fight, a siege, just as you would be trying to take a castle. 

But there navy also makes for a crap offensive. They get on the ground, in large numbers, you're in trouble, but if they *don't* get on the ground, if they *don't* get a foothold, then you have the advantage. Their advantage is on the ground- you will have trouble beating them there. But everyone else's advantage would be in the sky- in space. THe majority of their ships are transportation, with a few defenses and maybe heavy shields. Light armor. You'd be able to take them out and get hundreds of thousands of kills each time, as opposed to a couple dozen. A single cargo ship- and they're big- is deadly if it lands. It can protect itself with heavy shielding, having little else to direct power to when on the ground, so it'll be much harder to kill. It'll deploy countless units, ranging from walkers to mining machines to soldiers. The majority of its power will be in taking care of its dormant vehicles, and keeping the soldiers in stasis. 

Duck even said- don't say they're unmatched, make them really hard to defeat. That's what they are. They can be killed, but if you let the problem sit and you just blockade them, you won't make nearly as much progress as if you did if you act swiftly and deploy your own troops to hold their expansion, and bring in ships to lay support across each other. Some ships protect, occasionally sacrificing themselves, while heavy-hitters keep firing.

Is this acceptable, duck?

They are powerful when they've got a foothold in the soil, but they can be taken out during transit, and they are not very powerful in space-offense. The best they could do is run- they'll be the winners every time if they did that, since the chance of defeating an enemy fleet is highly unlikely. Droneships will be their primary offensive ship- think of the swarms from Ender's Game. A mass of automated drones responding in a hivemind-like communication, linked with each other and the motherships. Each one could block an incoming railgun shot, or keep a laser from hitting their motherships, while they slowly erode your armor with little lasers. Think less C&C marines, but more of C&C disintegrators.