Surveys of opinions rarely contain any reliable data. Nonetheless, I filled one out because I haven't been asked to before and was curious how it would be.
There are a few features I think have been done incorrectly. I realize that you weren't trying to make the holy grail of surveys, but just to inform you:
There is no option to weigh things equally. Without this, the survey probably got a lot more people skipping the questions. When things are close, and we have to pick a winner or not answer, we're going to not answer. Especially when it's labeled as "If you do not play as the faction enough for an educated answer" very few have done an exhaustive playtest study on these things. For example, maybe I feel that the TEC ships are fairly even except the Kol. I have done some playtesting with them, but not enough to differentiate between them, so clearly, my only option is to skip. That is still relevant data. Otherwise, you're just gathering biased data and data from those who really really know the differences (which is what you really want, but it's hard to get just that. better to try to wash out the biased data with average opinions).
There is no comparison between the capital ships of the different races. While nothing too meaningful can be taken directly from this response (people like their race, and so their ships will be higher, and the ones they want buffed will be really low), you can weed out the absolute worst, the absolute best and then show which are about even by comparing this result to the race-specific rankings. You might even be able to show that a particular faction is at a disadvantage.
I somehow missed the question about which faction is the strongest. Also needs support for ties.
All-important to conducting a survey: determining the bias of your sample. There should be questions about what your favorite faction is (not just the strongest), what you often play as, a few questions to determine the knowledge level of the player (ie "How do you think Shield Mitigation functions?", "Which of the following is the best response to a fleet of Long Range Frigates?").
As Timmy pointed out, 'most powerful' has many interpretations. Trying to draw 1 statistic from that is plagued with errors. If the intention was to find out what 'the best' starting capital ship is, that should have been asked instead. If the intention was to find out what 'the best' capital ship in a firefight is, that should have been asked instead. If the intention was to find out what people think 'the best' capital ship should be, that should have been asked (I think you got a few of these). If the intention was to find out what 'the worst' capital ship was, I think that is the only thing you can accurately draw from the asked question (because 'worst' covers all of those questions).
This isn't really your fault, and I'm not sure how you'd do it, but I am always upset that polls do not report their error. Especially when there's a breakdown of data like for the capital ship rankings. For example, the Progenitor shows the highest percentage of votes for the #1 capital ship, but it's average rating puts it at #2. The only reason that happened is because most everyone agrees that the top 3 for advent are progenitor, halcyon, discord. How to order them is a matter of opinion. Progenitor was a tie between #1 and #3. Halcyon was a tie between #1 and #2. Discord was a tie between #2 and #3. Clearly the error was +/-1 at least, so a ranking of 2.5 should reflect that +/- 1, but it doesn't. Not to mention that this is, what? 60-70 (at the moment) surveys out of how many Rebellion players? What if everyone who didn't take the survey thinks the Revelation is the best thing since slice bread?
I get what you mean about weighing things equally and about how my wording could have been unclear. "Most powerful" was intended to mean "best overall," but apparently that was not clear.