No, I think 4 units would be horrible for game play, and the Turks would have a good chance to take them out. 8 units seem like a lot, until you have seen 12 units dropped there 2-3 turns in a row LOL. I wouldn’t want them to be too weak to get anything done, or defend themselves, just to tone it down a bit. The UK can ignore India, then bam instant army in two turns. With a limit of 8 units they can still do that to a degree, but it will be weaker then w/o any limits.
At least we agree that it shouldn’t be unlimited