This will be no-bullshit 100% honest. Please don't take it the wrong way -- I really hope ACL continues to grow and succeed.
Online Rounds
These are fine. Honestly, they're ran well, the stream is nice, they're spaced out well and with a good format. Absolutely no qualms.
Offline Events
I feel like I've covered this in the other parts of this post. However I'm going to go on a small personal rant. I love that ACL runs events constantly and is essentially one of the VERY few things keeping Australian SC2 alive. However, you can't go out and complain about not getting enough volunteers to set up when your venue is in such an awkward position for so many. For example:
For me - 1h30min to arrive by public transport. ~50min to drive.
For PiG - ~1h (rough guess) to arrive by public transport. At least.
For Iaguz - probably longer than these.
For Ninja - he stayed with PiG because his house is even further away than mine.
A lot more people traveled interstate and thus would have likely not even been there in-time to set-up. If the venue was in a more central place (say, closer to a train station) I'm sure there would be more volunteers. However, it was an extremely weird way to open up the event. For a post on the internet after? Sure. To small groups of people? Sure. To your whole damn crowd directly preceding an event? You basically said "thanks for being ungrateful wankers" -- even though I'm sure that wasn't the intention.
Tournament Format
I think your open bracket system is strange (at tournaments). However, it works quite well so there isn't much to criticise. I love the fact that the final bracket is all single elim, however I think that if you're going to run single elimination you should consider starting Bo5 earlier and a potential Bo7 finals. This is, of course, if time would lend itself to this.
Spectator Experience
From what I saw, the spectator experience was great. There was no restriction to the players while they were playing -- which could be a negative, but seems like it worked out fine. SC2 not being on the main stage is understandable (and honestly, logical) and where the SC2 stage was set up was in its own little area - which has both benefits and downside. Benefitial in that hearing the casters would be a lot simpler than putting us where CoD was, detrimental in that you don't get the extra viewership -- for example, when a LoL match would conclude, many people would simply start watching CoD due to the convenience factor.
Competitor Experience
All I can comment on is the tournaments I played in -- honestly, they were all reasonable. The internet always seems to lag though. Every event. There has to be some way to check this before-hand. However, the admins and technical setup is almost always spectacular.
Streaming Experience
Way too much downtime. Put someone with a microphone doing interviews and run them during downtime. KingKong would be a phenomenal interviewee. Can't hurt to put Andy's face on a stream, ever. Like was suggested earlier, get replays and cast them. There simply just isn't enough content and it's tough to keep someone glued to a stream with downtimes that are extremely random.
Community Interaction
Could be improved, but I'm not well versed enough on the situation to comment here.
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