Strategy means "a plan of action or policy designed to achieve a major or overall aim". In HD, strategy refers to more than just the tactics you use to get a single recruit. The major, overall aim for most is to field a team that competes for championships. With that in mind, the value of strategy - the set of actions and policies a coach undertakes to field the best team - has increased in 3.0.
The value of strategy increases as a larger and more diverse set of plans becomes viable. By contrast, when there is one dominant plan, the value of strategy decreases. In that latter case, the value of other, non-strategic factors, like simple longevity and the knowledge of special tricks and hacks that come with it, increases. I suspect some people confuse knowledge of those special tricks and hacks with "strategy". The value of knowing all those tricks from 2.0, like how to calculate your opponents' resources, the points of major price separation in distance recruiting, how much relative credit HVs and CVs had relative to scouting trips, arranging superclasses to maximize resources, etc. has decreased. That doesn't mean there is less strategy. Playing "rock-paper-scissors" isn't much fun when rock always wins. And knowing how to choose rock every time doesn't mean your strategy is valuable. When there are more viable options at each decision point, the value of strategy is increased. There are now lots of ways to approach team-building.