There are some problems if the romance is the main focus. You really have to like the heroine to like the route, otherwise it will be boring. Because of this, not all LB! fans would enjoy a route like this.
And if the romance is the main focus, it has to be really good. If it’s just "I prefer vanilla ice cream. Hm~. Let’s kiss? (kiss) " this kind of stuff, it will be boring . Just like Chisato’s route in Koichoco (I did not enjoy). They put too little focus on the heroine’s problem and more focus on the elections, the useless talking that has no relation to the route, and the fluffy (and boring romance).
What I mean by a good romance is a romance filled with drama, and the proper settings. Like confessions in the middle of the sunset, dramatic love triangles, etc. If it’s like Kotarou and Akane’s romance in Rewrite, just like: “I love you. Me too. (nothing else)” it will be not worth it.
And you also have to notice that the heroine’s problem plays usually a big role in the romance. For example, Lucia and Kotarou’s romance wouldn’t be half of what it was without Lucia’s personal drama.
Because of this, I think a romance-focused route wouldn’t work very well.
