Sub-type indicates imbalance in processing that can be changed but it's like breaking a habit; one must really want and need to change. Ne-LIIs seem to over study and never seem to be satisfied with the information that they have, while Ti-LIIs tend toward excessive rethinking and second-guessing. LIIs can't improve their Ti or Ne, they simply need to use it. Being Ti-LII, I've often scolded myself with the words "you should've opened your eyes"; the problem is that I've been reasonably successful even though I miss a lot of information so motivation hasn't really been there to change. However, now that I'm older, I occasionally stop to smell the roses; perhaps you may find more cause to shoot the planner and get into production.....
a.k.a. I/O
What of those who experience both? For example, excessive rethinking and second guessing might lead to dissatisfaction with current information, so more information is sought, which might then lead to more rethinking and second-guessing, which in turn leads to seeking more information.
Given equal brain power, Ne-LIIs have the same rationalization (excellent at interpolation) abilities as Ti-LIIs; they just don't use it as much due to perhaps some circumstances during formative years. When I've had to make critical decisions at work, I've noted that my input abilities markedly improved (I seemed to engage more Ne); unfortunately for some of the people in my personal life, I reverted to a driven, production-oriented perfectionist when the crises were over.
a.k.a. I/O
My sub-type is ideal for a limited number of scenarios (similar for Ne-LIIs) but an equal balance of input and output is better for the majority situations regardless of the type. I consider sub-types as slightly handicapped (or some sort of minor savant).....
a.k.a. I/O