Dev team will be providing an update tomorrow!

... I hope the devs team learn the lesson to study data of your own game properly before launching or designing any new feature in the future. You have access to all data and you get paid to do the job. Feedbacks from players help improving feature but the devs team cannot rely on players to fix what's missing or what causes impact always. Coz u are the professionals hired to design the game feature. And we are just customers that don't get paid but instead spend money in the game.
I don't really agree with your sentiments. They are the developers of the game yea but they are also humans. Whatever data they can get internally
will never be sufficient to preempt all problems or issues that can arise from a greater number and variety of players entering a new feature. That's why they call it a
BETA. Dissing them for not doing their job doesn't really cut it here. There are so many possible squad combinations in the game and if you expect them to fully test out all of them and get enough meaningful data to determine whether a boss is too difficult, will probably delay the whole release
by weeks/months maybe.
They do not have the luxury of time unlike PC/console-only games, where developers like Blizzard can hold PTRs/Closed Betas for weeks and months and release the new features only when ready. Like if they hold Closed Betas for new features, people not picked for them will complain of losing out (maybe not immediately but I'm sure people will be pissed if it went on for a few weeks). And the data they get from these Closed Betas will most definitely be skewed by the type of players/guilds they allow into their Closed Beta. A few top guilds may be selected to test and with their leet squads will deem the difficulty adequate/easy during Beta and when they finally release the feature after a few weeks, 90% of the other people in the game will still complain about the difficulty being too difficult.
And that's after wasting weeks in Closed Beta.
You may argue that they can also get non-leet guilds to join the Closed Beta, but would they be as active as those leet guilds in Closed Beta to provide enough meaningful data points for the developers? Those non-leet guilds may have some inactives or new players who may not be able to clear this Raid at all, and how would the developers gauge accurately whether if this non-leet guild (a limited pool in Closed Beta) is not able to clear the raid because it's too tough or the members are not committed enough or the members are simply not ready?
All that above isn't even taking into account the volatility of the mobile games environment, where most of their customers/players may have short attention spans and could change their games like changing their pants.
They are just eager to get the feature out to an anticipating player base to increase the content available to their players and i do not fault them for that.
They have done their part and the patch was not bug-ridden. Bosses/UIs/skills work as intended as well as the claiming of rewards were working - that's what they were majorly responsible for. I am thankful they rolled out a new feature with all those checked (except for some iOS bugs (yay Android) that were also quickly fixed) .
What i feel they could do better though would be how rewards were promised in a feature that's classified as Beta.
The rewards system should not have been fixed initially until they decided they are ready to call that feature "Released". Instead, they could have rewarded all players who participated equally for helping them Beta test the new feature until they officially clear it for "release".
All in all, to the developers, i hope you don't pay much attention to those dissing you for not doing your job. They just probably don't understand the intricacies of the mobile environment and developing for them. On a whole, you are doing well generally in your willingness to listen to feedbacks and change accordingly. Please still continue to do so in this great game.
P/S. Please give priority to remove competition in the guild ladder for this new feature (Raid) in your future updates.