We might be approaching a point of diminishing returns as far as improving cultural transmission is concerned. Sure, it would be useful to adopt a better language, e.g. one less ambiguous, less subject to misinterpretation, more revealing of hidden premises and assumptions. More bandwidth and better information retrieval would also help. But I don't think these constraints are what's holding AI back.

Bandwidth, storage, and retrieval can be looked at as hardware issues, and performance in these areas improves both with time and with adding more hardware. What AI requires are improvements in algorithms and in theoretical frameworks such as decision theory, morality, and systems design.