EBT is already one of the most powerful 4th level spells. It doesn't need loose interpretations of rules to help it out.
Anytime you add something to the rules, you open the door for someone to exploit it. There are enough exploitable rules and it is no incredible challenge to think of a way to exploit EBT granting cover. The spell is fine. It doesn't need "fixing."
Don’t assume I was making a “loose interpretation”, and don’t assume I was trying to “fix” it. Do I need to explain what happens when you ass-u-me?
For instance, in the situation I mentioned in the OP, I was actually hindering the PCs’ use of the spell. (I was not trying to nerf or hinder the PCs, I was just interpreting the spell description). The PCs were fighting a Huge (but low, quadruped) creature and the sorcerer used EBT twice to “catch” the beast. The beast broke free, easily, and continued the fight. The PC archer wanted to fire at the beast through the EBT in an attempt to get it to come after her, through the field. (Nevermind that even an animal would know better than to move through a field of tentacles that just tried to grab him, but that’s a different issue.)
I imagined/interpreted, “a field of rubbery black tentacles, each 10 feet long” like a field of 10’ tall kelp, or corn, or wheat, etc. Now, my spur of the moment interpretation may have been wrong (hence why I came here and asked), but it wasn’t a “loose” interpretation or intended to “fix” the spell. I wasn’t adding a feature to the spell. I wasn’t trying to alter anything. Without an illustration of exactly/actually what the spell effect looks like, DMs are left to their imaginations. And such can vary greatly between DMs, and between Players and DMs.
I hate this spell. nothing slows an encounter better than EBT being cast.
I haven’t found this to be true. If you catch a bunch of creatures in the AoE, then you have to roll grapple checks for each one, each round, but that’s really not complicated or long. If you catch just one or two, the checks are no more than doing normal attacks against them, anyway. For each creature in the AoE, the DM rolls one die at the same time as the Player rolls one die. If the Player wins, he rolls another die. A 10 hit-die fireball has more dice rolling – 10 dice for the damage, then one for each victim caught in the AoE.
[Now
obscuring mist – that spell slows an encounter down.]
Quasqueton