Thank you, glad to inspire!
For Krika you are a few months too late, unfortunately. 
The trouble with wide shoulders, which is why I rarely even go for Inika-build width is twofold:
a) unless doing custom hips (which I am myself not fond of), it will make torsos look either even more T-shaped or triangular.
b) designing a chest piece becomes more difficult the more area you have to cover. I usually prefer single-piece chestplates, and those tend to not be super broad.
There’s a third point, too, which I guess hinges on personal taste - very braod shoulders tend to look a bit freaky on humanoid builds in my eyes. But these are of course not humans but Bionicle characters, so making them look “freaky” is absolutely valid if one desires.
As to the T-shaped torsos you addressed - I think there’s only so much to be done for humanoid builds in my building style which doesn’t incorporate a lot of system pieces and places value on secure attachment.
The problem I see more and more is rather “flat top syndrome” which is created by the angular nature of technic pieces combined with narrow shoulders. There’s simply no room most of the time to have some shoulder-neck gradient. I’m trying to mask it as well as possible, but if I’d want to fix it, I’d have to consider differnt ways to attach shoulder joints. Possibly at an angle. Which then becomes also a question of poseability and stability, especially on the scale I’m normally working at.
And if you want to try building custom heads yourself, maybe three tips I can give:
- Keep in mind that as with everything, designing custom heads is a process of learning/training. Looking back at my first custom heads, they hardly did more than get the job done.
- If you are building with physical pieces, make sure to accumlate a large variety of small pieces in various colours. Helps with experimenting with differnt options.
- For me it usually works best to pick a piece/a build made from a few pieces for which I have an idea where to place it on the head. Starting from that, one can then construct the rest of the head around it.