After a few days of driving around the Springs, I am having little to no issue with the .13 radio. Granted, both B25 and B26 signals are a bit weaker (no B41 around here to test) but based on my highly unscientific observations, it seems that when it falls back to 3G, it's for a valid reason - the LTE signal is poor enough that it's no faster (or even slower) than 3G.
I haven't experienced any fallbacks to 3G when the LTE signal is strong though which seems to be one of the primary complaints I'm reading from most of you. So based on my experience, I'm going to side with Robert's assessment of a network side issue and that the Springs is a mature enough LTE market that there are no fixes necessary in this area. Hopefully Sprint is aware of and actively working towards whatever network-based changes are necessary to fix the issues most of you are experiencing.
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