Li Shenron
Legend
I do think they will both likely have access to over 12 new spells each.
If it's only 12, I am not overly concerned.
But I do think that clerics & druids know too many spells, and it would be more fair to other classes if they had a fixed number of spells known like all other classes do. It's especially the low-level spells which are too many. There are also some near-duplicate spells, designed for the sake of players who had different requirements for example on touch healing vs ranged healing, but there is no fundamental need why each and every one cleric character must know both of them. The large number of 1st-to-3rd level spell has caused analysis-paralysis to some of my players before (which by the way is one reason why I typically give the players a "prepared spells starting package" suggestion).
It is however a much, much better situation now compared to 3e, that was a true nightmare*! So if they really only get 12-15 new spells hopefully distributed across the 9 levels (8th and 9th clerical spells are otherwise even too few), then it won't be bad.
*IMHO the whole edition was tainted by the bad bad idea that "since gods can do anything, so clerics should too"