Liar's Dice iterations

Liar's Dice is a game i already loved because it appearance in the gambling tables on Red Dead Redemption.
The game uses dice and any amount of players with the minimum of 2.
Each player secretly rolls an amount of dice, usually 5 or 6, and then the players take it in time to make a guess/bluff at how many of a certain number on the table, for example if I am in a game with 3 others and i have 3 of a certain number i can make an educated guess as to how many are also on the table, depending on how dice are being used by each player.
At your turn you can challenge the previous guess or make one of your own but it has to be either more dice or same amount of dice but a higher number on the dice.
If your guess is challenged and is wrong the you lose a dice but if it is right them the person who challenged it will lose a dice.
The winner is the last person with dice.

The first iteration made was to help people who had lost most their dice before the others as it is a slippery slop when you start losing dice.
The new rule was so that if you got all the same numbers on your dice and that was the amount of dice you had then you got one of your lost dice back, but you couldn't get more than you started with. For example if i had 2 dice and both dice rolled and landed on 2s then i would gain a dice back.
This would help people who had only 2 dice left but might make it too hard to go out when only on 1 dice as there is a 1:6 chance of rolling a 1 and getting a dice back and of course someone might be very lucky and roll all 4s with 4 dice.

A idea i didn't get to try was for there to be 3 dice in the middle, you might be able to tell I am a fan of Texas hold'em poker.
I'm not sure if this would change after every bet because that would really spice things up.

 Also I thought of having a way top swap a single dice of your own choice with someone else's, of their choice. This could be very beneficial for your educated guesses and also bluffing, deciding what to let them know.
I have no ideas as to when they would be traded and rules for that though.

This was very fun and their is quite a lot of potential for other iterations too, in red dead redemption a player can, at any time, choose to declare a guess spot on and if this is so then everyone else loses a dice but if its wrong the player loses one.