Which product specific questions your sales team (and indirectly, your customers) are raising.
Who is responding to these questions (ie. who are the SMEs).
What the question to answer timing looks like on average.
Tip: Count the number of similar or repeat questions, inconsistencies, and half-truths responses that could be negatively impacting deals.
About two weeks worth of monitoring these questions should give you a good feel for whether or not a more scalable solution is needed.