For me, it wasn't Clarkson, per se, but the chemistry between the three of them. I enjoyed the show, and only a little of that enjoyment came from the cars. It was mostly Clarkson, May, and Hammond.
Now they've got Chris Evans replacing Clarkson and probably a pair of unknowns joining him (open auditions). It's going to take a while for any sort of chemistry to build. I fear it's going to be like Top Gear USA which, at least initially, was trying to copy Top Gear UK with 3 guys who had zero chemistry. It was terrible..