I've created Xcom1 weapon mod that tweaks purchasable and laser weapons. Now they are stronger and have faster rate of fire than alien weapons. On the other hand plasma weapons are more accurate and a little bit stronger. IMO weapons are more balanced and you can use human tech along with alien weapons. I've made it rather for personal use but maybe you will like it. Or not. Anyway feel free to post comments.
Mod was created for Dos ver but it should also work for CE ver.