New research to counter bows

There is now an easily accessible research that improves bow attack, health and defense (+135% each). There is no equivalent for other troops. I propose research that develops attack, defense and health (+135%) for the other 3 troops (inf-cav-spear) and that it is accessible with resources and time but no specific object ( otherwise only the big players will have the research). This balances the game because many players only play BOW because they are very strong and cannot be countered.