Tattva-viveka means deliberation (viveka) on truth (tattva). This exercise is necessary for devotees. Let them study the philosophical canvass on which the art of Krsna is drawn with a view to fuel their practice with the appropriate conceptual orientation to their ideal. The attempt to realize the truth can be aided considerably by theoretical knowledge of the same.
Not all devotees will excel in studying and discussing the philosophy of Gaudiya Vedanta. Some have a propensity for this more than others. Still all can participate on some level and benefit. Asking questions is as important as giving answers.
My sincere hope is that all of my students will take part in tattva-viveka and to advance in krsanusilanam. Om tat sat.