I'm glad you showed up. I was waiting for you to say something but I have an essay to respond with if you don't mind.
I am pretty hesitant on the list, however, and disagree with a bit with what you said.
I know. I was warned greatly that people would find this list odd but this is how the game works for me. Some of my favorite decks are toolbox decks and things I can abuse Max Potion. You are free to disagree though but I hop I can explain my reasoning.
There's a lot going on here and it doesn't seem like it would draw well.
You have no idea. Sometimes I brick but I feel this deck can handle it assuming you can do something in response to damage. Some decks can also fail the same way and brick just as hard despite all the draw support.
One Paint Roller seems really out there and inconsistent. Ninetales doesn't exist in any shape or form in the Standard format (maybe at the bottom tables) and I would feel like a fourth Shrine would be more useful in that regard.
When I wrote this, it was something I would run into from time to time. This article was in editing for like a month and a half. I still think Paint Roller has a place but the space could go to another card. You can get around a Chaos Wheel and discard a tool and get a card but I like to prepare for random stuff. A forth Shrine could be useful but you win Stadium wars most of the time so three is fine.
Two Spirit Link? If your goal is to take advantage of M Pidgeot's bulk, you're gonna wanna evolve into that as soon as possible. A turn of doing nothing is a turn of not doing damage; your deck seems too reactive.
I like two because you often have a few free turns to just mega evolve. For me, it's an ideal turn for me since I want them to hit me first. Turns do exist where you can use other attacks and they do happen often. So in that case, we have the two spirit links for the other Pidgeot. It works better than you think, trust me here.
Also...NEVER does Birch > Sycamore - I can't even begin to discuss why 3 Birch should never be played in place of Sycamore.
I would like a better supporter but I feel Birch is the best option since we can see new cards. For me personally, I would much rather save things like Max Potion and VS Seeker just so I have them later. If you want to replace them with Sycamore but I feel you lose too many needed cards that way.
Octillery is risky as your sole drawing power, especially when Garbodor is so prevalent.
Yep, this is a problem but I make sure to kill them before they become too much of an issue but I like Octillery because it gives me protection to N. If Pidgeot takes a lead and it get N to one or two cards, it becomes harder to find the things you need to keep it alive. Octillery lets you stay in the game and have answers to things and I feel playing the deck with Shaymin-EX and Hoopa-EX makes the deck weaker though this is up for debate.
You mention adding Feather Lance and Mach Cyclone damage together for that perfect 210, but the deck seems to surround the idea of Mirror Move.
Ideally you want to use Mirror Move so you don't over extend by attaching Energy quickly to the Active. For me, I like to put that Energy on a Bench Pidgeot-EX and have that ready to attack while the Active sits there and sponge hit. The perk of 210 damage mean you can KO a Mega Mewtwo and Mega Gardevoir if they are slow. You just have to use your best judgement here when it comes to this but it comes naturally when you've played the deck a few times. You just need those feels.
If your deck wants to abuse Mirror Move and Max Potion shenanigans, I would consider including Puzzle of Time potentially, to make sure you get those resources back and to choose what you draw with Octillery.
I do want Puzzle of Time. In the list I've played with it, it was very useful. Having 4+ Max Potion a turn is so nice. I love it. I also want to fit hammers into the deck as well but deck space it tight.
My biggest issue with the deck is probably the lack of Hoopa haha.
For me, I tend to start with Hoopa-EX all the time so I just removed it because it ends up being an liability for me. Sure it's a very good card and gets you going but I find the risk of starting with it and being stuck is just far too great versus the benefits it gives you. This is entirely player depended. If you want to run Garbodor, then you should run Hoopa-EX and Shaymin-EX but I think that version is weaker than this list. I guess we just come from two different worlds, lol.