So?  You really think an planet is going to be able to take on an entire fleet?  Come on!  There is no sense in this.  

Now, in my mod, there was at one point going to be a unit (it was later scrapped since it would take too much time to make) called a troop transport.

It had three abilities that made it unique.

1. Repair Crew: donates crew to the ship which then goes about repairing damage manually.  While the boost is low (+4 HPS), it is over a very very long time (about 12 minutes).

2. Demolition Crew: donates crew to an enemy vessel and causes damage over time. This is a moderate DoT (-6 HPS), but it lasts for three minutes on frigates and two minutes on capitals.

3. Invasion Force: donates crew to an enemy planet and causes damage over time.  This is -12 HPS and -3 PPS for 60 seconds.

It should also be noted that all buffs stack and that the usage of any ability consumes the TT.

Something like that I am fine with.  The concept of invasion is okay, but actually doing it is not.  You need to give the illusion of invasion, rather than actually manually having to take ships down to capture cities.  I'm perfectly fine with giving an invade button to a player, but actually wasting time bothering to capture parts of a planet manually is a worthless venture.

There are plenty of things that I would like to see in a game like this, but they aren't going to happen.  Here are some:

1. Shield Cells: To represent the spreading of damage from one part of a shield to another.  In this was, you could actually punch through shields if you concentrated enough firepower on it.
2. Directional Armor: different faces on a ship are more or less heavily defended.
3. Point Defense: the ability to shoot down missiles.
4. More Guns: the guns on Sins are a tiny number compared to what would actually be on any real vessel.  We have modern battleships that have more guns than the Kol.
5. More Research: We eventually hit a wall.
6. Different Mitigation Rates: allow some ships to have incredibly high mitigation (and would reach it faster), but have low hull.

Those are just some of the things on my wish list.  You know what though?  They aren't going to happen.  1. is waaaaaay to computationally taxing (unless you intend to use a supercomputer).  2. is a lot of extra work for the devs.  3. is going to make physical weapons much weaker. 4. is possible.  5. is possible.  6. is a lot of extra work for the devs.

I know you guys want it, but it would just not mesh well with the way that sins is currently set up.  It would slow the pace of the game down dramatically.  Sure, you can bother spending 5-6 minutes taking one of my planets, but I'll bomb you to oblivion in 30 seconds.  I'm sticking with the one that makes sense.  

Once again though, I would like to reiterate that while I am fine with abilities such as those on the TT, actually managing that many units at once would be way too much work..  Doing it the way you guys want is far too taxing, on your computer, your time, and your head.  You can have buttons that say, "Invade Planet," but if you actually want to control the ground forces yourself, it will be a failure.

Empire a War tried this, and it is a horrible game.  The ground war is RTS while space is turn based.  EaW was a great concept, but it showed just how a game should not be done.  You can't possibly hope for both.  I know it would make you feel more in control, but it would not be good for gameplay.  That's what it comes down to.  It will make the game less fun.

I personally love watching an enemy planet being purged of Vasari scum via nuclear fire, but that's just me!