The problem with egypt is that there is little synergy between the UA and the UU + UB. Both the UB and UU favor a wide empire with 1-2 conquered capitals and maybe getting a religion that further buffs the temples (DF is definitely a strong pantheon with the start bias and if you can get culture from temples and a religious building it can be a very strong religion). But the UA doesn't work quite well with this startegy because there is little time for wonders. And playing wide you won't build many national wonders either.
On the other hand the UA works well with a tradition tall empire: you stack the bonus with aristocracy and get a science lead faster, letting you build more wonders. But the UB is not that great if you only get 4-5 of them. In this case you want to avoid early wars in order to focus on science and growth so the UU is useless. But going tradition let's you get ahead in science faster for any civ so really what the UA gives is just a reduction in hammers.
Egypt can be quite strong with the right combination of terrain and religion, but all this is situational so they can't be put in the first two tiers on any list.
On the other hand the UA works well with a tradition tall empire: you stack the bonus with aristocracy and get a science lead faster, letting you build more wonders. But the UB is not that great if you only get 4-5 of them. In this case you want to avoid early wars in order to focus on science and growth so the UU is useless. But going tradition let's you get ahead in science faster for any civ so really what the UA gives is just a reduction in hammers.
Egypt can be quite strong with the right combination of terrain and religion, but all this is situational so they can't be put in the first two tiers on any list.