Block Game Plus is a pack dedicated towards expanding upon and changing quite a few of Minecraft's features while still keeping the base game in tact. Some of these changes include new terrain generation in all three dimensions, new structures and dungeons to explore along with huge improvements to base game structures, and a more challenging ender dragon fight.
Modpack Features:
New In Game Visuals
New Variants of Vanilla Mobs
More Animal Pets Than Before
A More Vast and Explorable Ocean
A New Way to Travel with Horse Carts
New Plants/Furniture to Decorate Your Home
More Biomes and New Additions to Vanilla Biomes
Bigger Dangerous Structures to Explore and Conquer
In addition to these changes, there is a new way to get to the end. Instead of the old way of putting twelve eyes of ender into the portal frame, you will now have to collect at least twelve unique eyes. This is a change implemented by End Remastered in order to make getting to the end more challenging. Once you get there you may also find that the dragon herself is more of a challenge to fight.
Bonus Challenge:
There is a new structure in the game called The Lost City. Somewhere within the city you will find an end portal frame. This structure is quite rare and can be difficult to find, but poses an interesting challenge if you were to seek it out in order to reach the End.

This is the first modpack I've posted publicly on Curseforge before. If something is broken or there is an issue with a mod in the modpack please leave a comment and I will do my best to fix the issues as soon as I possibly can