LSU fans are clearly delusional. They seem to think that going away from their personnel strengths and emphasizing their weaknesses on offense is somehow going to help them. Their OL is huge, strong and SLOW. They are optimized for drive blocking for the run in confined spaces. They will not be at their best when asked to pull and find a defender in space. They will be even worse when called upon to pass block against a quick edge rusher or blitzer - as was demonstrated by the huge number of sacks (35) and TFLs (89) they gave up last year. It's an OL designed to run power between the tackles, not to spring the QB outside on an RPO or to pass protect.
The WR corps is big and mostly fast, somewhat like Georgia (emphasizing athletes) but with a bit more size and less speed. The other thing they have in common with UGa's WR corps is that they've shown athletic ability but not much in the way of decision making for option routes in the quick game. For that, you need good judgement and being on the same page as the QB. The former is unproven but LSU doesn't recruit players (or students for that matter) for their brains. The later requires a lot of combined reps - which is exactly what they won't have in game 2 it they really have installed a whole new offense in the off season. Going from run 5 yds and turn around or run deep to having to diagnose the defense requires very different qualities - ones that frankly none of the LSU WRs have ever proven.
And they want to build all of this around a 57% passer in Joe Burrow. His running is very similar to Baylor's Charlie Brewer or ISU's Brock Purdy but he's not in their league as a passer. The guy showed he can make the one tough yard and pick up decent chunks on the occasional scramble but he's not a guy I'd want back there as either a runner or passer on 3rd and long.
Finally there is the comfort factor. SEC teams may be disconcerted to see this style of offense executed with high-level talent. The outcome of both the Sugar Bowl and NCG would argue for that. But that is a total non-factor in the Big XII, where teams have been defending against the Spread with personnel optimized to run it for a generation now. WVU ran a power-based run spread even before they arrived in the conference and Tom Herman certainly can diagnose it.
In short, LSU may be switching to a new system that Texas is intimately familiar with - much more so than Orgeron One LSU is badly staffed to run that system and will likely do so worse than almost anyone in the Big XII. They going away from their strengths and towards their weaknesses or at best unproven and untested qualities. It may pay dividends against SEC opponents who have demonstrated clear vulnerability to such offenses assuming it's handled well. For Texas, it just drops right into the comfort zone of a defense that faces this sort of thing every week both in practice and during games.