None of what you said is even remotely specific, its way too open for interpretation, tactical gameplay ? Deep story ? Progression System ? What exactly does all that mean ? both FIFA and Command and Conquer have tactical gameplay, too different games, the term is abit too vague to be an identifying feature. Now FPS, thats a genre, you aim and shoot from a 1st person perspective, nothing vague about that. :D or racing games, you race stuff, pretty simple. But RPGs.... Even with all those things present they can still be applied to pretty much everything. Just like The Open World formula.
And heres what your little "Techopedia" says "The video game RPGs started out
very similar to paper-and-pen games, minus the
dice and with the addition of animated battles, but with the turn-based menu combat intact" sounds to me even from the get go, that the 1st RPG was a hybrid game. It was a like other pen and paper games except with Role Playing Rules.
It also goes on to say "Defining RPGs is very challenging due to the
range of hybrid genres that have RPG elements" see they can be applied to everything..... You know...... Like a formula.