So I'll just post my opinion without being influenced by others idea wich is fine I guess.
1/ Sentinel bonus should be reversed on offense.
The sentinel bonus should be exactly like it is for defense. For offense though, it should be reversed : Paragon should give bonus to everyone and soldiers should get all the bonuses, with higher "splash bonus" from higher rank (not a flat number like it currently is). This would be good for 3 reasons :
- This would allow different players to becomre Paragon : other players are more likely to take the Paragon's place since they have better bonuses, making the whole ranking thing within the guild more dynamic.
- This would allow high end player to help lower level players get decent score in war by boosting their stats, making all members somewhat even and thus making it more fun on players with more difficulties, and more challenging on better players.
- This would encourage high end player to spend more on bonuses instead of asking poorer, low level players to do so, wich seems healthier, and more likely to have a positive impact on game economy from a dev's perspective.
2/ Rewards should be revisited.
Honestly, very few people play the (currently) rewarded cards. They are only scary when the ennemy lines up 4 times the same card with the 3rd trait active, and still, not so strong in my opinion. Just scary.
But not only should the reward be different, but it should be handed in a different way, read "you should get more based on your bracket AND your position in the bracket AND your position within your guild".
Only then will all players at least strive to do better in guild wars. Currently, most of my guildmate are doing poorly and most likely don't intend to do better. I don't blame them as I don't care for the rewards, I only force them to play all battles... Wich they don't like.
I shouldn't have to force my guildmates to do guild wars. They should want to do it for themselves, the same way they spend gold in tasks by themselves or collect Guild Seals by themselves, because it benefits them before it benefits the guild.
An exemple of reward?
Let's say you earn your war points. At 100K war points, you can trade your points for a key wich has 100% chance to give you a random Legendary or Mythic troop.
3/ Event bonus
I fully understand the point of event bonus. Promote diversity and all this stuff wich is great. But then again, in war, you can't always benefit from this bonus, only your defense can, yours, and ennemies defense.
Playing against boosted ennemies when you can't answer with a line up countering nor with boosts on par can be a little frustrating.
To ensure diversity, maybe you should consider awarding points based on defense results, and these could be boosted depending on the type of units you line up.
Warning though : you should differenciate atk and def points, even more so if you include my suggestion #1, because the Paragon is the member who will most likely score the most in defense, as there should be more people attacking him.
That's about it for me. I think this would be enough to make people want to (play / spend on / strive for better results in) war.