Familiaris consortio, authored by St. JPII, was the last word on Communion for the divorced and civilly remarried. It unambiguously nixed it. Did that stop two phony, orchestrated Synods on the Family which addressed an already settled issue and the production of Amoris Laetitia which has spread confusion and dissent? Of course not.
It will be the same with the issue of deaconesses. The fix is in.
Deaconesses existed before. Though the role then was probably different that what is being proposed. The office called “Deacon” has meant many different things through the years, waxing and waning, but was most often a step on a mans path to ordination. However, it was also a stopping point for many.
I pray you are wrong about deaconesses. That would be universally seen as opening the door to female ordination. The RCC would be taking the same road as the Anglicans, just a few decades behind.
When you see what is gong on in the Catholic Church, it is enough to make one weep.