Korean redesign idea

The Koreans are really geared to Tower rushing. The civ has 5 of their 6 bonuses helping this strategy and it makes the quite inflexible and makes balancing towers quite difficult. The new beta patch is great, but it makes tower rushing bad for every other civ while slightly nerfing Koreans.

Koreans could be much more flexible and interesting. They used to have godly Mangonels. So this post is about nerfing their tower rush and help them with other things.

Here is what i would change:

1) Fortifications built faster is now Korean team bonus. Effect is reduced to 0.85x or even 0.9x build time from 0.75x.

2) Mangonel line +1 range as a civ bonus. (Was OP as a team bonus)

3) Stone miners work 15% faster.

4) Tower upgrades no longer free.

5) University techs cost -50%.

This nerfs 3 of their 5 tower bonuses, but Koreans still have great towers and also great Mangonels now.

Cheap university techs fit them well since Koreans get all techs. It still helps with towers but not so much and instead helps with Archers (cheap ballistics), Gunpowder (cheap Chemistry), Siege (cheap Siege engjneers), defense (Masonry, Fortified wall) and economy (saves resources). This would make Koreans a much more flexible civ and nerf the annoying tower rushing.

What are your thoughts on this idea?