I do agree it seems harder ( got past the lion boss though have totally hit a roadblock with the next major boss) but also 100% agree with From re exploring.
I just went off for a nose around once I realised I was stuck and found huge areas filled with new stuff and upgrades that I would never have found if I’d been able to beat that boss.
I think increasing their effect is the perfect answer, so that’s really good, as it did feel like you had to find ALL of them to make a difference. A lot of people just seem to be trying to play it like a boss rush though. It’s so much bigger than the obvious straight line path. It’s really densely and vertically laid out.