I wasted a lot of time this morning combing through all the players in two large clans gathering some statistics. I wanted to see what the actual data shows.
I took the player's average win rate and their win rate in the goose (as well as their win rate in the Me-410 if they also had it). I excluded planes with 5 or less battles. I then made a scatterplot and added a trendline on the data. If the Goose were neither overpowered or underpowered, the data should end up with a trendline running from 0:0 to 100:100- meaning if you are a 50% player, you would win 50% of the time in a perfectly balanced plane 80% would win 80% of the time, etc.
If a plane is more powerful, the line would shift up from the perfect average. It means you would expect to win, say 55% of the time if you are a 50% player flying that particular plane or 85% if you are an 80% win rate player. If it is less powerful you would expect to win 45% of the time in that plane if you are a 50% player and 75% of the time if you are an 80% player. This obviously doesn't work on an individual basis, but with a large sampling it should provide and idea of how the plane performs.
The data shows that the Goose on average has about a 5% better winrate for a given pilot than their average. It honestly isn't as high as I was expecting, but I don't know how that compares to other planes (except the Me-410 which the chart shows). There were a number of outliers- very low scores on the goose by both good and bad pilots that drag the line down. I wonder if I had more data if that trend would hold.
Additionally, it can provide some interesting data on the skill level required to fly the plane. A high skill / high reward plane I would expect to have a steeper line- that is a good player will do better than their average in it by a larger amount than a bad player will do better than their average in it. You can actually see the opposite with the goose- a 90% win rate player could expect a 92% win rate whereas a 50% win rate player could expect a 55% win rate. This would suggest there is no great skill level required to fly it.
The Me-410 data surprised me a lot- it actually has an even shallower slope implying good pilots win less in it than their average by a pretty serious amount and bad players to slightly better than their average. I was expecting it to have more reward for good players based on the thrashing I have received from a good player or two in it, but the data doesn't show that.
(The forum won't take an image so here is a link to the charts: https://drive.google.com/file/d/1luiL_ZnYX4kEhk1CfEbyQqdFlUNl4vOT/view?usp=sharing )
I also started tracking my battles with XP-54s in them (including battles I fly in it). So far the Goose side is 4 for 4 with a Goose taking 1st place. (Though there was also a goose on the other side in one of those, so that Goose took a loss despite a 21K point showing).