[First reading critique.]
Another good issue, though not a lot of substance to it; it's an extended, character-driven fight against a villain without a motive. "If You Can't Beast 'Em..." (nice title, BTW) is like the Thunder and Lightning issue (only without a moral) in that the Titans need to re-think their usual strategy, or the Plasmus fight in "Transformation" (Plasmus just happens to be some place, just happens to be ingesting toxic waste, and just happens to fight against the Titans).
The story also continues the Robin/Speedy parallel from "Winner Take All," so there isn't too much different in their relationship, except that they are not quite as competitive as before (save for the cute chibi ending). The two derive at the same conclusions (using the same ice tools, realizing they need to contain rather than separate Plasmus) and use the same dialogue (with Speedy even taking over Robin's battle call duties).
Since the Robin/Speedy dynamic is the same, Speedy has not yet assumed the more gruff personality he will assume in his "Titans East" appearance; he instead remains a copy of Robin's teenage, heroic, fun-loving, slightly competitive, and highly athletic personality. He's not a cliché personality, but he's not too dynamic either. Overall, he's just there, not really offering anything new; he's not Green Lantern in JLU's "Initiation" with the “little guy” shtick or the bow to go with the dues ex machina poles that need to be shot into Brimstone’s intake. Instead, he acts as Robin would have (freeze Plasmus) and determines the plan that any other character could have derived (instead of separating Plasmus, scoop him back together).
Other than that, Speedy was great. The design is still good, his dialogue is funny early on ("Plasmus go boom" and his hair problem) and him taking over the battle cry was a good moment.
The Titans remain in character; Beast Boy's thinking about his stomach and bickering with Cyborg, and Raven is her usual droll self ("And over there...and there...and there..."). Cyborg and Starfire seemed to be in the background more so for this issue, though I liked their "flying" dialogue towards the end; too bad Cyborg didn't have an exaggerated angry face to match Beast Boy's panicked face (as well as the nice stomping action in which he was engaging).
The artwork is still great. The first page has a great layout, with the off-screen Titans appearing in the cast bubbles with different reactions to Speedy’s standoff; Beast Boy’s panic, Starfire’s fascination, Robin’s analytical look, and the intensity of Cyborg and Raven’s stares are all appropriate. Also, good design on Plasmus and his gloop, and the shadow silhouettes throughout just appealed to me for some reason. Other good moments include Cyborg’s befuddled look alongside Beast Boy, Robin and Speedy’s panic, and Raven’s passive look while sitting in her protective bubble.
The chibis are also great, but it’s difficult to see the Mad Mod cameo. [And, I’m sad to say, I didn’t anticipate the answer to the Cyborg + bull – borg joke.

]
Bullock's cover...sigh, how I wish that there was a nighttime scene outside the Tower like in this cover. It just looks so good when that bright arrow aim at the viewer is added. So...Is that how an archer is supposed to hold an arrow? Also, while I like the stylized character models, Speedy looks emaciated.

Facial hair is a nice touch, though, and the entire cover looks good.
Also, although the toxic waste allows Plasmus to assume his split-up form, I wonder what that does to his human form; just like “Transformation” and “Aftershock 2” didn’t let the viewer know what mutating the monster did to the human, this issue doesn’t let us know how this new power will affect Mr. Slack…er, the human. I wonder if the ice will actually keep him frozen long enough, however. [EDIT: Nevermind; I forgot Plasmus split up in "Divide and Conquer" as well with no problems to his human self.]
Finally, the letter page mentions Red X will make an appearance (something J. Torres already mentioned in
the previous talkback).