No, it's the opposite: Having participants who remix before or after your coinjoin increases your anonymity set.
Sure. Wasabi limits the number of inputs you can use in a coinjoin, because... That'd increase your anonymity set. Pretty good reasoning. 
Wait, you don't know about the address reuse by the Samourai team?
That particular transaction you linked is clearly done by an individual deliberately. It's a list of (probably Samurai mixed) inputs consolidated into a single output. Can you point me to evidence that this was considered coinjoin round by Samurai software?You shouldn't reuse your addresses for coinjoin transactions either.
The software shouldn't. The user isn't responsible for faulty software selecting previously used addresses as receiving for fresh coinjoined coins. The transaction I linked is a Wasabi coinjoin, and as far as I'm concerned the user isn't requested to select which addresses they will receive their coinjoined coins; the software does that automatically. Okay so you were bluffing then since it's not "trivial" to trace someone's Coinbase withdrawal like it is to trace Whirlpool transactions which can be done with just a Bitcoin node.
It requires more effort than merely following consolidated inputs, yeah. As for whirlpool, can you tell me my outputs if I give you a whirlpool transaction?