I think you are right. Charlotte does have great value for rank and consequence and it probably had its start in her father. I also agree that closer association with Mr. Collins has made this more pronounced. I noticed Charlotte does two Mr. Collins-like things:

The party did not supply much conversation. Elizabeth was ready to speak whenever there was an opening, but she was seated between Charlotte and Miss De Bourgh -- the former of whom was engaged in listening to Lady Catherine, and the latter said not a word to her all dinner-time. (Chapter 29)

I thought it was odd Charlotte’s attention is so focused on Lady Catherine to the exclusion of Lizzy; it stuck me that such devotion was of her husband’s calling. Lizzy spends quite a bit of time observing everyone during dinner and not focused on Lady Catherine. Then again, perhaps Lady Catherine dominates the conservation and Charlotte is focused on her because she has to be. We see in Chapter 31 what happens when Lizzy and Colonel Fitzwilliam have conversation inaudible to Lady Catherine—she must find out about it. Then later:

On the following morning he hastened to Rosings to pay his respects. There were two nephews of Lady Catherine to require them, for Mr. Darcy had brought with him a Colonel Fitzwilliam, the younger son of his uncle, Lord -- -- , and to the great surprise of all the party, when Mr. Collins returned, the gentlemen accompanied him. Charlotte had seen them from her husband's room crossing the road, and immediately running into the other, told the girls what an honour they might expect… (Chapter 30)