Before you read any futher, realize you're reading near seven pages of what might be considered an unorganized rant, however I did my best (at 3 am) to organize and present my view of mistweavers and their deeply-rooted mechanical issues which need to be addressed before any semblance of "balance" can be reached.
To preface this, I feel you're trying to tone back our healing, and this is why you're nerfing jabx2/uplift (which is never actually a rotation anyway, ReM/EH/Mana Tea needs to be weaved in there and you only use it when you need to heal...or in other words, jab makes up less than 1/3 of my chi on a large majority of fights because it is already more expensive per healing done than ReM/EH, but I digress.) This won't work for a couple reasons. You're either going to nerf jab so harshly that it is completely impossible to use with any real healing spell, or you're going to not nerf it harshly enough and we will stack spirit such that we continue using it. This is a very binary relationship, stemming not from it being particularly strong, but because of the other 3 "spammable" choices, it is the "lesser of 3 evils".
Soothing mist is slow, unreliable, and using it as a melee healer (let’s be honest, if you aren't in melee you're doing it wrong, it lets you avoid numerous raid mechanics etc., regardless of whether you actually melee the boss) COMPLETELY and totally breaks the flow. As a healer, we need reliability. This means that not only is it not FUN to use, but it will NEVER be a viable spell as far as I'm concerned (until it outclasses other abilities so much that it is no longer "unreliable") unless it's ridiculously broken in comparison.
SCK still feels slow (esp. w/o the glyph slowing your movement speed comparing to jabbing for chi, like on Duruumu when you need to move w/ the beams) but not as much as Soothing. It has very high throughput comparing to any of the other chi builders, but due to:
-Natural overhealing (blanket healing which leads to...more blanket healing?? wtb ability to bring specific people up?)
-High gear requirement (large amounts of spirit/crit required to make it actually spammable...gear which will be "below-average" in T15 normal modes)
-Complexity (So you thought it was hard weaving in an 8s CD and 15s CD between instant casts while performing triage? Now try it while spamming a 2s~ [plus or minus, but it doesn't fit cleanly into this rotation] channel. It's much tougher, because of how things line up.)
Due to these things, it's less widely used, and not necessarily any more powerful than Jab, even though it comes with more drawbacks.
Jab is fast, it's visceral for lack of a better word, and it leads to healing spells like a cast time. Jabx2/uplift is like a 3s cast time, but requires more interaction and allows movement. It's a very ARPG-ish take on healing. However, it has no innate healing (okay, a 12k smart heal that relies on eminence [which, frankly, is !@#$ with a 20 yd range, but I'm not going to get into that here]) and can lead to easily over-spamming it. [Other problems can come from this, but it's basically what you learn to deal with as it is the "easiest" to learn and can be learned from any gear level.]
Healing as a MW isn't even remotely this "binary" though, and by binary I speak to using any specific chi generator and solely that. Although learning how to heal as a MW lends itself to a binary nature due to the chi -> healing method, once you really learn MW, you know when to use which generator at appropriate times. This is engaging, gives some room for judgement calls, and generally improves the skill cap on a class.
Personally, Jab is my favorite chi generator because of how it feels and it's immediate, reliable nature, but I still use the others in the times where they are called for.
So I've given a brief explanation of why we (or I?) use jab so much as our go-to generator and the "jabjabuplift" mindset has been born. However, in this next patch you're trying to dissuade it. Due to the mechanics of our healing, you cannot dissuade it. You will either utterly break it for everyone (impossible to use), or it's reliability will make nearly every progression-minded MW resort to it (and stack spirit to make up for a reasonable increase in cost [nearly triple is not even remotely reasonable, in any sense of the word.])