Your opinions and feelings on YOUR map should always come first.
If i were you, I honestly would just playtest this map privately with some of your mates or with people who know how TF2 works
(Players who have a lot of experience in competitive TF2 and know how TF2 level-design is meant to be designed and generally know what class balancing is on a map, etc. General stuff)
And not someone who just happens to be good at playing TF2 and can move in the level.
I find Hydro a fun map, but I sure as hell don't tell other map creators to make a map JUST like Hydro and include its layout in his/her map.
Let's say you're making a dish. You want to make a delicious pasta, and you have happened to create a holy unique sauce that has never been seen before.
Of course your sauce has inspirations from other sauces, but the taste of this sauce is different than the rest.
You're looking for testers, see if you can improve on this sauce and make it in general more tasty. Someone tells you to add in pesto because that's what they like and that's what this sauce should also be.
You add in the pesto and it again tastes unique, but not in a good way.
You call in more testers and see if you can improve this version of the sauce.
You get a second suggestion and someone tells you to put in carbonara.
You add it in and it tastes even worse than the previous version.
Why is this? Because you've added too many ingredients and now your sauce is too overloaded with different tastes and spices and it has become a frankenstein monster.
I'm probably off the train tracks with this post and don't fully understand what's going on and such. But i do want to tell you that this is YOUR map and YOU'RE the designer.
Create a map that you think is fun, let people play on that map, if they don't think it's fun.
(Which is hard to know because people are very used to Badlands, Granary, Gullywash and Process in ETF2L)
ask what they don't find fun, ask for a detailed explaination on why this should be changed and how it should be changed.
Also have as many different perspectives as possible, look for a solution that's fits your style and vision, because again this is your map.