I purchased this and played through one time as a simulation (never researching the "tech" allowing me to control any fighters). My quick review is $4.99 is too much as the game currently stands.
There's a pretty big design decision, coupled with a current-state-of-the-game shortcoming, which makes for an unsatisfying experience. I'm going to provide two sets of spoilers for my issue (I'd double nest them, but I don't think that works in our forum software). The current-state-of-the-game shortcoming should not be a spoiler, and it's that there-isn't/I-couldn't-find a way to save a game in progress (meaning to strap in for a 3-hour soup-to-nuts game, or leave the game open in the background if you want to use your PC for something else for a time).
My design decision issue is, in general, ...
If the full 365-day campaign left you wanting-for-more and a follow-up play through that may be deemed acceptable, but I have to say that the last 100 days of my play through saw me stop making min/max decisions and rather sort of accelerate to the upcoming game end.
If you want additional details as to my complaint in the spoiler above, then click into this next spoiler.
The game would have been a fun diversion at the $2-3 level given the unsatisfactory shortcoming. It's entirely possible that direct controlling gladiators (an aspect I didn't try) may provide the additional few bucks of entertainment that I think the current offering lacks (for me). I didn't find there to be other simulation aspects, far afield from the decisions I chose the first time through, which would make me eager to give the game an additional play through. I haven't researched the state-of-the-game development to know whether this is still having features actively added to the base game, but if the game is considered feature complete as it currently stands, I'd certainly wait for a sub-$3 sale on this one.