I find them both powerful UAs in the sense that they allow you to take particular areas of the game and put them in a vicegrip, which with the increased level of specialization in G&K is very handy. If you sell-out compoletely on a particular victory strategy, these two are immensely powerful.
France's UA is extremely good bc when you rush the Liberty tree, you can get a free settler, the +1 production from Republic or free workers much quicker than any other civ and your borders expand ridiculously quickly early-on. +1 production per city is nothing to sneeze at either. That's made the difference in me getting some wonders I've wanted and building defensive fortifications in time to stave-off defeat.
The tactical advantage this gives you should you choose to sieze it is extremely powerful. It's intended to give an early advantage while their UUs give them an advantage in the mid-game. The only gripe I have is that it drops-off after Steam Power, but bc they moved Steam Power back later into the tech tree and you have the option to cookie-cutter your techs around it for a bit, it's not as much of a killer.
Egypt's bonus by itself is a bit underwhelming at times, but when combined with a production monster city (Like a city with Desert hills near a river and Petra) or with other buffs like the Monuments to the Gods Pantheon and the marble boost it can make for devastating Wonder hogging. Also, the bonus essentially guarantees that you can beeline for a particular wonder you want (I usually go Stonehenge or Great Library) and be sure you'll beat anybody else to it, even ppl with marble (As they'll need to build quarries first; by this point you'll be halfway done with it). I find getting these one of these two wonders in the bag early provides you with an insurmountable advantage in tech or in founding your full-blown religion.
If you can get a tech lead and beeline education, you'll find yourself with a major edge and researching techs before the AI can while you have a wonder boost almost guarantees you the wonder from that tech. If you can get a religious lead and adopt tithing or some other powerful founder belief and start spreading it like wildfire while other civs aren't able to compete with you religiously, you can get a vicegrip on the game fiscally. I find Ramses to be appealing, but you have to have a very specific meta-strategy in mind and decide which wonders it is you want.
The only two gripes I have are that Egypt's UU is useless (Especially when I look at the Hun horse archer, which does the same things but with a free promotion and better defense against melee as well as no rough terrain penalty to make-up for the +1 movement) and France's power expires too soon. Even a drop-off from +2 culture to +1 would be nice. France's UUs and Egypt's Burial Tombs more than make-up for any UA weaknesses, at least to me.
