Yes, I completely agree with you. I feel Beth short changed the game by wasting resources on voice male and female protagonists--when all that budget could've gone into a more dynamic dialog selection based on your SPECIAL attributes as with past games, adding more quests/side missions, world encounters, companion AI content. Or refining the settlement building feature and providing us with pre-war textures so we could build the absolute range of pre-war to lowly fallout shanty settlements. So we could open the Pandora's box and get into a whole new OT debate on that one.
So my dream to rebuild Vault City in the Commonwealth is on temporary hold until next year when GECK ships. But instead of complaining about the lack of things to do--or what Beth failed to add to the game because of obvious development budget and time constraints--I've opted to be more proactive and positive in the meantime.
Example: eagerly anticipated rebuilding Vault City based on the lore when Beth revealed we could build settlements. Was very dissappointed with the lack of textures and building material limitations encountered and unlocked in the workshop so far. But rather than being ungrateful and blasting BGS for failing to include "X" features to make me enjoy the game more/longer, I opted to direct my energy to innovative RPing instead. And do creative, non mission custom quests and activities which Beth didn't add by way of game mechanics features.
So my point to the OP was that the degree of satisfaction they can expect to receive from an open world, sandbox game like this one, is only limited by their imagination. Because it didn't sound as though sandbox gaming suited their achievement based gaming style. In which case, they're probably better of playing the likes of GTAO or CoD. Those games were explicitly designed to always provide the player with something to do in them.