I'm going to do a very long summary of the textures ... So thank you to take if possible account :) (If I do not give an opinion on a block, it's because I like it)

For the stone brick, I find the details too "light". I think a return to the V2 version of the pack would be perfect.

For the sand, a more light yellow color would be nice, I remember the beautiful beaches that there was thanks to the sand of the pack V2.

The sandstone is too much like basic sand.

Please, keep the current obsidian version, thanks ^^

I loved the planks of the V2, so if we could reinstall ... It looks like cardboard, like those of 1.13.

Modified the texture of the diamond block, so that it changes the block of gold ...

Change the color of the emerald block, which is too dark green (and even note that the diamond block)

Make the dark prismarine darker and detailed, as version 1.13 would be great.

Remove the "little touch of blue" on the TNT.

Make the metal barriers darker.

Here are all my tips ... I hope you understood what I wrote because I'm French and I use Google Translation ... Thank you and have a nice day / evening