May be you still don't know, but I arrived to the forum a few days ago, applied for membership and started to have great fun since then. Very glad about that.
Yesterday one of my teammates asked me if I had a mod installed (we had a terribly bad communication over a noisy mic and I could not understand much of what he said). I do have modpack installed, this one: http://forum.worldoftanks.com/index.php?/topic/35966-1011-aslains-wot-modpack-wpicture-sound-preview-19-08-06-2018/
...which I find it extremely useful, in particular all the garage functions they implement, like locking your gold coins so you don't actually spend money by accident or allowing the automatic sharing of equipment like binocular or camouflage nets among your vehicles so you don't have to equip every one of them with binoculars, etc.
As for the battle functions proper, most of them just make you slower. I like the option to disable the possibility of shooting at wrecks or shooting at your own team, knowing the stats of your rivals, etc.
Some other stuff is just fun, like changing the default music to Star Wars and stuff like that. They make you laugh but I disabled them after a while.
However, I would like to know the position of the rest of the clan members regarding the uso of modpacks in general and this one in particular.
Do you use them? Do you recommend them? Do you frown upon using them?