For better or worse, things have been extremely inactive here lately. After looking at the archetype, for the most part, it looks fine, but... well, it kinda doesn't work as you described it.
The way you described it makes it sound as though, when you attack, you can immediately trigger one of the attack target's effects as though you control that monster. It is a cool concept, but what your cards actually say is that they literally steal an effect. Further, because the effect is "overwritten", they simply keep the effect and cannot overwrite it with anything else (i.e. your big boss fusion would only steal/use 1 effect even if it attacks 5 monsters). Now, that is fine (if not bonkers in the right context *cough*attackingCannonSoldier*cough*) but due to how you made it sound, I assume that wasn't your intent.
I am no good at PSCT, but I think an immediate activation condition would work better than how it is worded. I.e. instead of them saying: "This effect becomes...activated effects.", you could say something like: "activate 1 of the attack target's activated effects* as though you control that monster." ...or something. Perhaps someone else could suggest a better way to write it out.
As it is, because of the current way they work, I cannot in good conscious let them into the AGM just because we do have lots of things that could be potentially loopy when used with these as they are. If they are fixed to be more in-line with your stated intent, then yes, I'd be more than willing to push 'em in.
* I'd also strongly recommend you change "Activated effects" in the texts to "Ignition, Trigger, or Quick Effects", simply because those are terms that, while not really mentioned on the cards themselves, are official terms that leave things less ambiguous than "Activated Effects".
Traptrix Rafflesia has a similar wording and the copying of that effect is only for that activation. This is due to it copying the effect and not the conditions or costs, so the next time it would attack it would just become a new effect. I got PSCT help from Azuriena and used the wordings of cards with similar effects, and as it stands the effect only becomes that effect during its initial activation. I've been learning a lot about PSCT over the months so that I can actually implement my gimmicks properly for these situations, but the fact that you didn't understand it tells me that the PSCT could be done better despite working properly in official terms.
Activated effects is just requiring that it has a colon ":". The effect is already limited in the kinds of effects in what it can do, most notably not being able to use archetypal effects and targeting effects. On top of that, it requires you to go into the Battle Phase before doing any of that stuff, so its fair.
If you make the PSCT "Activate" then the effects would include their costs, which would be a nerf in a lot of ways, for example not being able to copy Xyz or archetypal costs. Personally, I think the effect itself doesn't need nerfing, but I could use the wording for a couple other cards that don't require Battle Phase, so that might be fun.
As for Cannon Soldier, 1. most people don't run that, and 2, like I said before, its only copied during the initial activation, so it would just be 500 damage when the effect activates, and unless you're willing to attack that monster 16 times and have it somehow work, then its probably fine. It would probably be better to attack Amazoness Archer to their field with the Level 9 Fusion, but even then they do enough damage to probably wouldn't run it for the sake of consistency. If it was, it would be for OTK purposes, not the usual FTK shenanigans.
Due to the modern theme being the default, I literally cannot read Eshai's post, so I'm gonna let the others talk in regards to whatever you said. Hopefully you didn't insult me or something in the midst of card discussion.
Idk why you wouldn't be able to read it other than that I typed it into Google Docs first, and that the fonts themselves are that color rather than an adaptable color depending on the website themes. Imo you could just change it back to the old one (I still have the old version) but I'll try to adjust it.