If I buy a game, I expect to experience the content in reasonable time. Has nothing to do with instant gratification. The way stuff is locked behind a grindwall looks more like a F2P design - except you can't unlock stuff with real money.
Even if I look at Warframe - I can unlock new content released there in way more reasonable time than in ED - by simply playing.
I have to disagree on this one. Nothing is locked behind a grind wall. You can experience every type of content in this game (PVE wise) with a ship costing 5 million or less and most of it with an upgraded Sidewinder. Lets look at the major content additions:
-Wings: not locked at all, you can wing up with any ship any time
-Planetary landings: not locked, every ship can carry an SRV. You can even choose a starting Sidewinder that comes with an SRV if you bought Horizons.
-Missions update: not locked, even a starter Sidewinder can do missions, not every mission of course but salvage, data courier and low-ranking assassinations etc. should be possible. With a ship costing 5 millions or less you can do almost all types of missions (including surface assault).
-Power play: The same, no grind wall to participate, just sign up and do it.
-Engineers: I agree it was somewhat locked behind a grind wall but not anymore. Of course it takes time to get the grade 5 upgrades, but as mentioned before, class one and two upgrades are very easy to get and you can get the materials by just doing what you usually do most of the time. If you define experiencing content as being able to do everything possible fairly quick you may be right but just using the engineers and getting a few mods is in no way "locked" away.
-Exploration: People have taken Sidewinders halfway across the galaxy when the game was first released. An Adder, Hauler or Cobra are excellent low-budget exploration vessels.
-Combat: A Viper III or Diamondback Scout as well as an Imperial Courier are excellent low-budget fighters. In the hands of a good pilot you can go against almost any opponent. There are Youtube videos that prove it and I have done it myself. Even though I have an A-rated FdL and Clipper I prefer the small ships and enjoy combat with them a lot.
-Trading: A fast Cobra is an excellent smuggler, rare trader or Robigo runner. A Type-6 is fast and can do long range hauling missions for decent money (if you don't have the cash for something bigger).
It all depends on your point of view, but regarding the game's activities you can jump right in. No grinding necessary.