I would like to see an expansion of the decorative medals that you have made available for the Gold Ticket individuals attainable via the BattlePass event.
I think it would be good to see those decorations on the actual models in game as a starting point. Furthermore, you already have a medal system in WT, can you please go cut and paste the relevant sections and attainment trees out of there, do bit of a once over to refine the attainment on infantry / armour / aircraft tasks - not dissimilar to what you already have for the weapon, troop, or other cosmetic/perk tickets. This would be a nice step towards customisation.
To ensure that this was reasonably representative of the difficulty to get a medal you could put in some caveats that any progression towards a medal by an individual soldier could only be achieved whilst under player control, or that they had to have a minimum time in battle to begin the earning process etc… There are tons of ideas that could be applied here.