Your post is very hard to read, please learn better english. It seems your example is that in other RTS games an attack unit can be made before a tower. But this is already the case for AoE 2, as the militia unit can be made a whole age before towers. I think the real problem is that towers are relatively strong in AoE 2.
This change would break with the way the AoE 2 tech tree works. All tech (except age advancement) is unlocked by age and the building it’s researched in. In SC2 al tech is unlocked by having buildings.
What do you think about my solution?
With building foundations having no armor, they can easily be destroyed before finished. Currently it’s suicide to send your villagers to counter an enemy tower if you discover it. Mostly because villagers do very little damage to buildings. This is fine in general, but makes no sense for building foundations.
This change makes outposts useful, it will allow you to detect tower rushes in time. It’s not good enough for the attacking player to start walling around their tower, as those walls too can be destroyed easily. If the tower rusher does get a tower up, there will be a much greater need to place the next one within range of the first. As the defending player is now paying attention and will surely destroy any new tower not properly defended. It rarely works the other way around because defending towers will be defended by the town center.