If it comes down to Blythe vs. LDT, I'll take LDT. LDT is a proven commodity and would be the starter without Smith. He won't be 31 until next year. Andy is going to keep at least 9 OL and I hope one of them isn't Wylie. As to your question about paying a cut player to a bench player, you have to pay that bench player that took his place too.
But Frozenchief brings up a good point. We're the team with the riches now, not the beggars of 2013. Take a look at the final roster, especially on the O and all the transactions it took to get there.
https://en.wikipedia.org/wiki/2013_K..._Chiefs_season