I'm getting 31 orc strategist per hour from my grounds of orc strategist That 744 per Grounds per day. 8 squares means almost 100 orc strategist per square per day. The mistake is it's 32 per hour, not day. In addition, my orc strat grounds provide 6800 culture (lvl 15). That's 850 culture per square.
So: 740 orc strats and 6800 culture for 8 squares for the grounds of the orc stratigest
vs a lvl 3 Witch Hut (which is about the best you can do with the event and FA) gives you,
1738 pop, 8140 culture, 1452 frogs and 1792 orcs.
For most players the extra pop and culture are okay, but not worth a lot. If you are in chapters below about 8 you may still be experiencing some pop problems, but you are usually at the point were you can solve them pretty easily. So it is, in my opinion, the orcs and frogs that really make the building worth something. But is it more than the Grounds of the Orc Strategist, square per square?
Since the Grounds of the Orc Strategist is 16 squares and the Witch Hut is 16 to compare square per square you increase the Grounds of theOrc Strategist by 1/2 (or equivelant to 4 squares) to 1116 orc strategist. You also need to consider that Orcs need to be trained to be Orc Strategists so there is that cost as well.
The Witch Hut, at lvl 2, (which is probably what that second Witch Hut will be for most players) the orcs and frogs are: 1320 and 1590. Thus, square per square, I think, a bit less than the same number squares dedicated to a Grounds of the Orc Strategist.
So if you think 1188 frogs and 1431 orcs are worth the same or more than 1116 orc stats, you will consider Soggy's statement about a lvl 1 Witch Hut to be true. If you, as I, think the value isn't quite there, you will disagree. In the end, my analysis says that Soggy is close to right but just a bit short for a level one Witch Hut. And at level 3 the 2nd Witch Hut is worth the space but below that it's a close call to a reasonably firm "not."
AJ