this is my interpretation of the entp 7s i know. the 7s at least (the e3 entps are different) have a language that is fun, functional, and extremely simple. and they're very against embodying discourse for the sake of embodying it. they don't like internalizing declaratively (think inferior Si), it has to be through Ti and it had damn well better have a pragmatic reason, as knowledge is measured by what's false based on a specific puzzle or storyline that one has begun trying to systematically build.
i find some of them very intellectual. it depends if they're matured to pick a few systems that they want to build. the depth is in Ti. but it's still so broad and fluid enough to meet their generalist sensibilities, which is when they really start to get awesome for me.
i haven't met as many intellectual enfp 7s. the relationship to knowledge is often fuzzier, and the intense curiosity is guided more towards practical action??? (i don't know, like a faith-building process which then turns into Te, vs the searching for knowledge of what's false like Ti does in order to systematize). but, with that said, one of the most engaging intellectual conversations i've ever had was with an enfp 7w6 sx/so. really brilliant and charismatic speaker, and he's picked his problem and done the work. same kind of thing as the entp system building. you need a few specialized domains to keep calling you back (e7 --> e5), even if you'll always be more of a generalist.