Nope, I disagree. It is GOOD if/when specialists get unique special recipes.
What would be bad, more specifically lackluster is if did what you asked giving small buffs to HQ chance etc.
I get it that you just want to omni-craft...you want to do everything yourself and can't be bothered to make alts in order to gain access to all specialist recipes but some of us want specialists to be important, to actually make a big difference when make that hard choice which to specialize in and to have a lot of value when make that choice. To push people towards cooperation and sharing burdens, benefiting the community as a whole not just some individuals being narrow-minded and selfish in the desires to do everything themselves by proxy of continued omni-crafting; limiting the community involvement in achieving or furthering of goals instead of through working together as specialists having others do what you cannot and yourself do what they cannot.
The prestige and recognition that would come from going above and beyond generic omni-crafting into becoming a 'specialist' who has devoted themselves to reaching the pinnacle of a profession would be an added benefit, the value in doing so being substantial which unique recipes would be and not marginal which is what your suggestions are. Omni-crafting should be jack of all trades, master of none. Specialists should be the masters of their profession and the reward should be a lot more than what your suggesting. Some unique recipes would be a more adequate reward but you hate the idea because a) you would need to put in the effort to counter it via alts and b) you just want to continue selfishly omni-crafting to the detriment of the community working together. You seem to want to marginalize the benefit of specializations going by your suggestions. Put another way your suggestions are so minor and so marginal they are next to worthless to me, you say "NOT inherently bad" but I say they are "NOT good enough".
It may be true SE have not decided which route they will take and they may only be considering it but I along with others do want unique recipes for specialists even if you and some other do not. We know SE does not look kindly on omni-crafting and for quite some time has tried to counter it to varying degree's of success and failure but it seems to me SE's desired destination and overall goal for future DoH content and systems is more inline with making specializations actually important and not some tacky minor buff which you want, SE from my perspective wants to continue to reduce omni-crafting in general and they want people working together as a community to build things and accomplish things...not have every tom, dick and harry do it all themselves without the help of others. FC workshops are a prime example of the direction I believe SE wants to take crafting in future, working together to accomplish things not doing it all yourself. We will have to wait and see what SE does but I for one hope specialists will get some special unique recipes.