Scrimming teams in the same tournament and scrimming the team that you have a match against at the latest is very different , 100 thieves are on different side of the bracket and cannot be the immediate next match up or even the match up after for envy , hence why them scrumming each other makes sense , Sentinels scrimped envy in Masters 1 when both were in the tournament , but not Faze because they were the match up that was immediately coming for them , scrimming with the people you'll be immediately facing as the first match up is not something which is done . I also would lie to ask the source for when and where you received the information that Liquid and Navi have scrimmed.
If what you're saying is true that would be an exception not the norm , I've yet to come across any NA team that through verifiable source scrimmed a team they were going up against immediately after. Even in EU this is rare , Fnatic went so far as to not scrim anyone in Iceland , FPX doesn't scrim with people from EU
" you're much more confident in scrims and do whatever you want so there's nothing like you'll reveal your gameplan and all that stuff."
There are certain tendencies people maintain regardless of how they're playing , XSET Ayrin talks about this in plat chat , some kind of smokes they throw , how a certain individual from the other team reacts to his teammate's action or to their own action. He mentions how he's seen Dapr throw a certain type of cage in ranked and in scrims , and they spammed it in the match to kill him , this is a tendency they learned from ranked along with scrims. Also this isn't as simple as this in this scenario either . Envy are going into the match having the advantage of the enemy not knowing how they're going to play , this is very important and different from normal scrims , it gives the enemy team an idea of how a player is going to play around in a team . This is something 100T struggled with the first time they played the new Sen roster(Nitro mentions it in their video after Masters 1) and that they hadn't scrimmed them either . Sen had 5 scrims after their first match but didn't scrim 100T,for this very reason. The first map 100T had no idea what TenZ was gonna do with the team , they had no reads , and hence they not only lost but got completely destroyed , later Steel was able to call more effectively , because they'd already learnt the way TenZ was playing and they gave him less opportunities to capitalise on.Oderus in his latest stream also talks about how KCP with Jammyz didn't scrim the people in their bracket because of this reason .
"i saw asuna tweeting abt if scrim's are of any importance if somehow envy doesnt get a spot on berlin so would mean they're destroying everyone in na. with all whats going around, doesn't look like he's troliing"
Regardless of whether he's trolling or not , just because the tweet he made isn't complete troll doesn't mean it's completely serious either , it can be an exaggeration , because scrims actually mean very little , ABX were scrim demons destroying everybody , what happened to them ? Asuna has multiple times in his stream sarcastically remarked that scrims are very important , obviously meaning otherwise.Also people frequently talk about Envy and their scrims , not just in obvious joking manner either. It's nothing new to do.It's just more news because of Yay's hype coming in , they've always done well in scrims , and always had tweets written about them , the Yay addition amplified it.
Also TL didn't scrim V1 and NUTURN didn't scrims Sharks when they went to Iceland (Lakia talks about the teams they scrimmed and mentions they screamed Sharks later)Another example of teams not scrimming their immediate opponents.
There's much more to scrims than not revealing Strats and just playing , any top team always scrims to for development , if they aren't doing anything special then they rather not be scrimming at all , you learn way more than Strats. The only type of scrims that don't have any learning or development involved are warm up scrims , but those are done before matches not during the preparation period.