@Typhonis
My biggest problem with it is the Planetary Shield around Coruscant.
In the actual Battle of Coruscant, the issue is that Grievous uses an unknown hyperlane (co-ordinates povided by Palpy) that allows his fleet to revert to realspace right on top of the Coruscant Home Fleet. He starts attacking the planet right away, lots of ships dropping to within the shield circumference.
Normally, the shields are not up, because it would block the (massive amounts of) space traffic to and from Coruscant. Even the multiple, rotating shields set-up would be to cumbersome to commercial traffic. (Note that nobody expected the attack on Coruscant. They figured they'd see any fleet coming.)
So the issue became that raising the shields would trap a lot of CIS ships inside, while nearly all Republic ships (capable of fighting them) would be locked out, still engaging the other CIS ships in high orbit. So the CIS ships within the shield's confines would be free to wreck the surface without much in the way of repercussions.
The shields
were raised later during the battle -- as soon as it became opportune -- which I seem to recall even trapped Grievous inside, briefly, while he was on the surface, abducting Palpatine.
Anyway, the "window of opportunity" for colony-dropping a big ship right on the temple would therefore be wide open during the early stages of the battle. However, this would hardly be very useful, as (during the battle), most of the Jedi on Coruscant were actually away from the temple... fighting
in the battle. Moreover, most Jedi were away from Coruscant, fighting in the Outer Rim battles (which is part of what made the surprise attack so effective).
This whole scheme is hardly more efficient than what Palpy actually ended up doing.
If you want efficiency: use a cloaking device (first invented by Sienar by 32 ABY at the latest, probably earlier, although still experimental and ludicrously costly). Just put it on a good sized rock with thrusters attached, slap a hyperdrive on it, move it to the Coruscant system via hyperspace (already cloaked), and then have it crash right on top of the Jedi temple using a pre-programmed trajectory. Do this at a point in time when
as many Jedi as possible are in the Temple. Have the whole operation carried out by droids and/or non-human agents whose minds can't be read by Jedi.
Then just grab the popcorn, put on your sunglasses, and at the appointed time, watch the Jedi Temple suddenly just explode in a fiery conflagration, as it is hit by a giant invisible rock moving at ludicrous speeds. (Pro tip: do this shortly before the Clone Wars are set to start, per your plan. Blame the CIS for everything, and thereby legitimise PATRIOT Act-esque security measures. Never waste a good crisis. Especially not one that you've engineered yourself.)