Compared to PF1, 5e doesn't have that many. The former has 7 different groups of dragons (chromatic, metallic, imperial, primal, planar, outer and esoteric). 35 true dragons in all.
Only if it is the first time you have taken such a route by yourself. The first time is when you are likely to get lost because you are trying to understand the directions, of which there could be a lot of them that need to be followed. But the more times you take that route, the better you...
This is a Draconal Agathion from Pathfinder 2e. It's much better looking than the PF1 version IMO. Back when I was collecting PF1, I wanted to play as an Idyllkin Aasimar Monk (Scaled Fist) who was the descendant of a Draconal Agathion.
I think I would borrow some elements from the Essence...
Less character classes in an RPG works well, if not better, for you. But for others such as myself, more character classes work well for us. More classes for me lead to more choices and opportunities on what I can play as in an RPG. Especially in an RPG like D&D or one of its' adjacent RPGs...
In essence, the character is the avatar form of the player within the setting. ;) They are who we would like to play as. We get to explore through them what would it be like to be an elf, a dwarf or a dragonborn and as a member of a particular adventuring character class.
3e's Unearthed Arcana did present both the Ranger and the Paladin as 15 level prestige classes.
As for them being subclasses of the Fighter in 5e, the Fighter gains subclass features at 3rd, 7th, 10th, 15th and 18th. Is that enough subclass levels to make a Fighter (Ranger) and Fighter...
As for the heritages, the one second from the left and the last one look interesting. The former looks they're from the Japanese series Kamen Rider. Kamen Rider media usually revolves around the titular defined group of motorcycle-riding superheroes with an insect motif who fights supervillains.
Currently 5e has fewer classes than PF2, which currently sits at 25 classes (minus their archetypes). PF1 had 36 classes. Level up just has 15 classes.
Or when a homebrewer like Laser Llama creates a class whose concept has been talked and implemented about for years but hasn't quite satisfied that itch. I am talking about his Magus class, which is the arcane counterpart of both the Paladin and Ranger classes.
Laser Llama's Ranger class looks...
The number of classes, subclasses and feats in a given RPG is a Goldilocks thing. For some, reducing the number of classes to the bare minimum is a good thing, but for others can be a bit stifling by limiting their creativity. For others, having a large number of classes can offer them a lot of...
Or how about the Mutants and Masterminds route where you have to pay for everything (ability scores, attack bonus, defense bonus, saves, skills and powers aka class features)? :p All within a set power limit. The only neat thing about the M&M route is that you get to design how your powers will...
It's more than just doing a concept well. Reducing the number of classes down to four (Priest, Wizard, Rogue, Warrior) might make the remaining four more complex than what they are now. As now the new 'subclasses' of the four will have to add in more material to help distinguish one subclass...