I guess the only "sense" it would make, is that it is a significant inconvenience to hire a Texas attorney from Indiana - and an expense if it requires travel - and so it would be in the ex-wife's best interest to be able to interview local Indiana attorneys, rather than trying to find someone she trusts, remotely.
First of all, it's not all that difficult to hire a lawyer in another state, so "significant inconvenience" is quite an overstatement. As far as travel, the case is in Texas, so that's the reason why travel might be needed. It has nothing to do with where she hires a lawyer. Moreover, even if your friend could find an attorney in Indiana who happens to be admitted to practice in Texas, she would have to pay for the attorney to travel to Texas for any court hearings or depositions, and I can assure you that will be a LOT more expensive than traveling herself. In any event, any inconvenience or additional expense is of your friend's own creation since she's the one who chose to move.
Interestingly, she felt that part of the reason she was given such poor service, was that she was not able to go into their office for personal meetings.
Again, and whether or not her feelings about this were justified, she created this situation by moving.
What she really needs to know is, if she CAN legally hire an Indiana attorney to represent her.
She can legally hire anyone she likes, but only an attorney admitted to practice in Texas may represent her in a case pending in Texas. Not surprisingly, most attorneys admitted to practice in Texas are located in Texas.
While it's not inconceivable that a handful of lawyers exist who are located in Indiana and admitted to practice in Texas, I expect that the number of such attorneys could be counted on one or two hands. And, as noted above, paying for the attorney to travel between Indiana and Texas will probably be more than twice as expensive as hiring an attorney who is local to the area where the case is pending and traveling herself for meetings.
It's also worth pointing out that, even if she could find an attorney in Indiana who is admitted to practice in Texas, such an attorney probably would not REGULARLY practice in Texas and, since Texas is such a large state, almost cerainly would not practice regularly in the court where the case is pending. Such an attorney would be at least at some disadvantage (and possibly a significant advantage) in a case against a local attorney.