On the one hand, you have Ti DS (and probably specifically Ti DS/Ne HA) leading in most cases to very unclear communication, due to omitting logical steps in the middle of a train of thought, since Ti DS leads one to assume that their reasoning/Ti is self-evident (my understanding is that types tend to assume their DS is self-evident).
On the other, Ti HA and Ne DS seems to lead to a meticulous focus on internal consistency, while neglecting to actually make a point. This is a serious issue I run into attempting to explain any logical system to someone, since I get bogged down in all the structural intricacies without explaining what on earth the system is, or can produce volumes of observations, comments, and information without any clear point to it. If you want someone else to look at for this, I think Cyclops manifests the Pointless Commentary Syndrome from time to time, too.
As for Ti HAs, you'll notice them on the forums being rather exacting in their demands for reasoning, not out of helplessness and lack of understanding, but out of desire for debate because they are confident their reasoning is valid (or the others is invalid or absent). The HA can be used more liberally, aptly, or confidently than the DS (which can be used in the latter two ways if the individual is sufficiently dualised, from my understanding; though it will always be more careful than liberal), so types can sort of brandish it about.