Engineer's Toolbox I think it was added a redstone wand that made a redstone pulse where you clicked, I think it worked by making a briefly lived block which generates a redstone signal, not sure as it's been a while since I touched the mod. Everything else seems like you actually want several different tools, a lot of them don't even seem to have much to do with redstone. Getting something that generates a redstone pulse where you use it would be nice as a simple focus though, the rest should probably be split up into several possible tools as they're pretty superfluous to the original purpose.
Yeah, i figured i would add some off-taste stuff like light emission and maybe knockback effects, i cannot find myself equipping a focus just to make a 1-2s long light source but you're right, this focus needs to be simplified greatly.
I think the "normal-mode" is pretty good though, straight forward, imo it starts to become something else when blocks becomes involved and borderline OP maybe.
I was just thinking: how can i keep a door or something open with this for more than a pulse? i needed a continuous redstone signal, you could make those blocks not-solids and that would disable a lot of the cool/op stuff imo. Instaid of trying to do everything with this focus alone i realise for example that i could use the already existing system to my advantage.. say like the thaumcraft warding focus, that one would prevent this focus from removing certain redstone blocks you want to save. I just really love elegant multi-purpose solutions, having like 10 different functions is very clunky and not very elegant.
This focus is about first and foremost simple redstone signal application by using vis instaid of buttons/levers/pressure plates/redstone torches/redstone dust and so on for simple stuff.
The block creating could probably be put into another focus tbh, it could actually be a focus about block teleportation or creation / removal, you could with it teleport 16 blocks around and you have 16 redstone blocks available, you will have the same function then as i tried to put into this focus? There is one already for 1 block in TT but that is extremely limited, i cannot build a platform with it nor can i wall myself in from angry mobs. But if it is dedicated to this i dunno if only 16 is enough anymore, i'm not sure if it is better to have removal/recreating focus or block teleportation either =_=
I'm also thinking about challenge maps, with the ways of interacting with the environment it kinda reminds me of puzzle games. The current redstone i've encountered is: you place a device on the floor and "link" it somehow to some device by hand and sometimes you have to even go into UI and change things in there, very deliberate stuff. I want to control stuff while i'm flying around trying to dodge the boss dropping explosives on me or something, no time to fly all the way to the floor / wall and place a redstone torch for bad control. The relative small diameter of the redstone projectile was so that aim would matter more, 1 diameter "explosion" would be too hard i think tho.
So thats why i liked the Function 3b maybe more than 3a, 3b would allow for this control when i'm flying and from a far distance without linking stuff up before hand.
A vanilla way of doing this is with arrows and wooden pressure plates i think? i'm not sure how to make it work or how good it is.. i think i would love this focus but i want too much again. The reason i suddenly wanted this is because of the TT transvector dislocator, it requires a redstone signal to teleport a block / aura node but it can only teleport 16 blocks i think.... as you know good aura nodes can be very far away, it was annoying have to place this redstone torch all the time and building stuff just to place this torch. an AoE redstone signal around me would allow much simpler process of activating the transvector dislocator.
So in a way i think this focus represents a mastery over redstone signal channeling when you don't need extra tools to produce a signal, just your wand and focus.