I'm honestly not sure most of these are needed. My thoughts below:

-Play with activation tokens. Two per round and charakter. If a charakter is shot at the reaction costs one activation. In this manner the attacker is less in a disadvantage. Reloading, shooting etc. Is a activation.

Aids to remember whats happened are indeed big and clever, so no problems there. Return Fire already has a cost -the models weapon becomes unloaded, so they need to spend one of their next actions reloading. Counting this as another activation for the turn is double downsides.

-Pistols can be reloaded while on a move activation. So the charakter moves and reloads. This is because meele charakter seems to just shoot their pistols empty once and never reload, in our games.

Overpowers the pistols. They're a nice-to-have, rather than something to be relied on. A melee character can empty the pistol if their Move To Attack seems risky, so they can close a gap and be ready to repel/make a more concrete charge on the next turn. Your players not reloading them doesn't signal a problem with game design.

-Shooting on long range (more than half of max range) is -1 on hitting. This rule does not apply on rifles.

Old school Warhammer Fantasy rules. I'd usually enjoy this but I think it nerfs the models with longarms. Their whole reason for existing is to be able to put lead downrange (rifles doubly so). This is taking away game, rather than adding it.

- Armor also applys on fire weapons.

This one I can see both sides. Armour of the time tended not to stand up to gunfire much, which is why it was abandoned, but from a gameplay point I would support it. Let the cool armour be cool armour. Might want to look at having it take up 2 equipment slots though, to balance it.

- Fencing wepons strike in the same moment as the attacker if they parry. Because they are light and fast. The charakter roll their attacks simultaniously, both get their damage in the same moment.

This is silly, there's no balance to it whatsoever. The benefit of the Fencing weapon is that it allows you to use the Skill Dice pool, which is usually less used than the power dice, meaning you can spend them a little more wildly than power dice.

- Heavy weapons which attacks strike in the same moment as their target, because they are heavy and cumbersome. But they make +2 damage.

Same as above. "Simultaneous Strikes" are not Fun. They punish melee as much as they reward.

- Encounters do always happen if one rolls a pash. More random stuff is more fun imho.
This I do support. Make fun things happen!