Yes.

Actually, instead of free testing on release, they should just make test server available to everyone.

I agree that we should be able to test them first, it will make it easier to know whether or not they'll be fun to use.

and try them as the weapons are effective when they are at their maximum. try them as if then you can't bring them to the maximum?? all the weapons are effective, but only after you have spent a thousand euros per weapon.. this game is not convenient for your wallet, given the high frequency with which they nerf old weapons, and propose new weapons that are similar or only restyled,

it would be like I've already had the chance to play in another game, a map with bots, with different weapons and different levels, that if you kill them they leave the weapon on the ground and you can pick it up and try leaving yours, in turn, on the ground, but I understand that the game engine is unable to handle these changes in the game... a map to choose from among the existing ones... with bots as always aggressive but that give the possibility to try the weapons once killed.

totally agree 

Alternate method, a return policy. Have a hard time justifying which weapon or Mech to purchase (in game or $$) when I've never used them. One hour refund option would be a great change. One could argue to only allow use in Custom Games for trial period.

Or you have to use a small amount of credits like 5K to use it once. Then as you use the mech the credits it costs to test it out increases from 5k to 100k