Before my first Camino a Spanish friend told me it would be like in inside out sandwich - the best bits on the outside and the middle (the Mesata) a bit blah.
Many, who love the Mesata, will disagree. On my last trip across it it rained all the way from Fromista to Leon so on my latest CF, along with a friend who had walked the Mesata previously in a blistering heatwave, I caught the bus from Fromista to Palencia and the train on to Leon and have never regreted it.
As
@Faye Walker says, if you want a Compostela, make sure you walk continuously from Sarria onwards and get at least two sellos per day.
There are many baggage handlers, Jacotrans being the most experienced - they carried our bags on the last stretch into Santiago on a day when it poured with torrential rain. We stood like drowned rats in the foyer of the Reis Catolicos and in came our packs, bone dry!
Better to take the odd bus than risk further injury. It's
your Camino, walk as you will.
Buen Camino.