At the end of the day a max level event buildings takes a lot of work, dedication, and/or real money. With that in mind they should be a building players can get excited about. When the current year's building is far less exciting than the previous year's building for the same event, Inno has failed its players. I am not saying every event the buildings have to get significantly more powerful, but give us something to be excited about and is worthy of the effort it takes to get to max level.
The result of the pressure to do so has led to fp inflation, the introduction of event buildings with higher attack bous for attacking armies and even defense bonus for attacking armies. The inflation is running rampant in my opinion, and I urge Inno not to keep that inflation going. So I providing some counter pressure against the push to give this building more of anything, provided that the building is balanced. Looking at the various analysis I've seen (esp. the comparison to sleigh builders), the building seems fairly balanced. I do not deem it very attractive due to its large size and lack of fp's, and I care little for even more random units from the age. But I know that attack bonuses are highly valued, with ony defense for attacking army rating higher. So this is a fine building for those who want that, seeing as it also gives units and goods.
So please do not improve it (much).
Also, the event allows us to collect Crow's Nest upgrades or kits, which is an awesome prize. It seems every event allows you to win a building that gives an attack bomnus for attackers, either as the new main prize or as a secondary prize from the earlier editions of that event. That seems like a good decision, and while the pirate ship gives an attack bonus, the ships are suffering from the inflation. So this update with units instead of fp's is a good variation.
Let's compare the two:
in FE, pirate ship gives 8% attack bonus, 4fp, 15 goods. It takes up 3x7=21 squares.
The Gov Villa gives 26%, 4 units and 40 goods on 6x5=30 squares. That's more than three times the attack bonus, 2,67 times the amount of goods and 4 units instead of 4 fp on roughly 1,5 times the # of squares. That's a bloody good improvement.
I believe that it should not be compared to the Bathhouse, which is unique. The Timeless dojo also comes from a different mechanic than events, but seems a valid alternative that CAN be acquired limitlessly in theory. So let's compare those. The dojo provides 1 unit, 4 fp, 5 goods on 3x3=9 squares. Three dojos roughly equal the villa in squares, and provide 3 units, 15 goods and 12 fp versus 4 units, 40 goods and 26% attack bonus. The villa seems like a much better deal than the dojo to me.
That comprison almost tempts me to ask the villa to be nerfed. : D
Definitely no improvement necessary.